73 (number)
Encyclopedia
73 is the natural number
following 72
and preceding 74
. In English, it is the smallest integer with twelve letters in its spelled out name.
In astronomy
,
in The Big Bang Theory
, played by actor Jim Parsons
, said "The best number is 73. Why? 73 is the 21st prime number. Its mirror (37) is the 12th and its mirror (21) is the product of multiplying, hang on to your hats, 7 and 3. ... In binary, 73 is a palindrome, 1001001 which backwards is 1001001."
Sheldon's roommate, Leonard Hofstadter
, then quips that "73 is the Chuck Norris
of numbers," to which Sheldon replies "Chuck Norris
wishes. [...] All Chuck Norris backwards gets you is Sirron Kcuhc!"http://the-big-bang-theory.com/quotes/episode/410/
Sheldon's devotion to the number is illustrated in several further episodes, when he wears a t-shirt emblazoned with it, for example in The Roommate Transmogrification
.
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...
following 72
72 (number)
72 is the natural number following 71 and preceding 73. It is half a gross or 6 dozen .-In mathematics:...
and preceding 74
74 (number)
74 is the natural number following 73 and preceding 75.A seventy-four was a third-rate warship with 74 guns.-In mathematics:Seventy-four is the twenty-first distinct semiprime and the eleventh of the form 2×q...
. In English, it is the smallest integer with twelve letters in its spelled out name.
In mathematics
- Seventy-three is the 21st prime numberPrime numberA prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number. For example 5 is prime, as only 1 and 5 divide it, whereas 6 is composite, since it has the divisors 2...
. The previous is seventy-one, with which it comprises the 8th twin primeTwin primeA twin prime is a prime number that differs from another prime number by two. Except for the pair , this is the smallest possible difference between two primes. Some examples of twin prime pairs are , , , , and...
. It is also a permutable primePermutable primeA permutable prime is a prime number, which, in a given base, can have its digits' positions switched through any permutation and still spell a prime number. H. E...
with thirty-seven. 73 is a star numberStar numberA star number is a centered figurate number that represents a centered hexagram, such as the one that Chinese checkers is played on.The nth star number is given by the formula 6n + 1...
. - 73 is the largest minimal Primitive rootPrimitive root modulo nIn modular arithmetic, a branch of number theory, a primitive root modulo n is any number g with the property that any number coprime to n is congruent to a power of g modulo n. In other words, g is a generator of the multiplicative group of integers modulo n...
in the first 100000 primes. In other words, if p is one of the first 100000 primes, then at least one of the primes 3, 5, 7, 11, 13, 17, ..., 73 is a primitive root modulo p. - 73 is the smallest prime congruent to 1 modulo 24.
- The mirror of 73, the 21st prime number, 37, is the 12th prime number. The number 21 includes factors 7 and 3 and it is a palindromePalindromeA palindrome is a word, phrase, number, or other sequence of units that can be read the same way in either direction, with general allowances for adjustments to punctuation and word dividers....
in binary (10101). Seventy-three in binary, 1001001, is also palindromePalindromeA palindrome is a word, phrase, number, or other sequence of units that can be read the same way in either direction, with general allowances for adjustments to punctuation and word dividers....
. In addition, of the 7 binary digits representing 73, there are 3 ones. Also, 37+12=49 (seven squared) and 73+21=94=47*2, 47+2 also being equal to seven squared. - Every positive integer can be written as the sumSUMSUM can refer to:* The State University of Management* Soccer United Marketing* Society for the Establishment of Useful Manufactures* StartUp-Manager* Software User’s Manual,as from DOD-STD-2 167A, and MIL-STD-498...
of 73 or fewer sixth powers (see Waring's problemWaring's problemIn number theory, Waring's problem, proposed in 1770 by Edward Waring, asks whether for every natural number k there exists an associated positive integer s such that every natural number is the sum of at most s kth powers of natural numbers...
). - In base 5, the smallest prime with a composite sum of digits is 73.
- 73 is the only prime repunitRepunitIn recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1. The term stands for repeated unit and was coined in 1966 by Albert H. Beiler...
in base 8 (1118) - 73 is the smallest factor of the first compositeComposite numberA composite number is a positive integer which has a positive divisor other than one or itself. In other words a composite number is any positive integer greater than one that is not a prime number....
generalized Fermat number in base 10 (104+1 = 10,001 = 73*137) - 73 is a sexy primeSexy primeIn mathematics, a sexy prime is a prime number that differs from another prime number by six. For example, the numbers 5 and 11 are both sexy primes, because they differ by 6...
, as it differs from 67 (also a prime number) by 6. In fact, 73 is a sexy prime twice over, as 79 is also prime.
In science
- The atomic numberAtomic numberIn chemistry and physics, the atomic number is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element...
of tantalumTantalumTantalum is a chemical element with the symbol Ta and atomic number 73. Previously known as tantalium, the name comes from Tantalus, a character in Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion resistant. It is part of the refractory...
In astronomy
Astronomy
Astronomy is a natural science that deals with the study of celestial objects and phenomena that originate outside the atmosphere of Earth...
,
- Messier objectMessier objectThe Messier objects are a set of astronomical objects first listed by French astronomer Charles Messier in 1771. The original motivation of the catalogue was that Messier was a comet hunter, and was frustrated by objects which resembled but were not comets...
M73Messier 73Messier 73 is an asterism of four stars in the constellation of Aquarius. An asterism is composed of physically unconnected stars that appear close to each other in the sky as seen from Earth...
, a magnitude 9.0 apparent open clusterOpen clusterAn open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist...
in the constellationConstellationIn modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
AquariusAquarius (constellation)Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for "water-bearer" or "cup-bearer", and its symbol is , a representation of water....
- The New General CatalogueNew General CatalogueThe New General Catalogue of Nebulae and Clusters of Stars is a well-known catalogue of deep sky objects in astronomy. It contains 7,840 objects, known as the NGC objects...
object NGC 73, a barred spiral galaxyBarred spiral galaxyA barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in approximately two-thirds of all spiral galaxies...
in the constellation CetusCetusCetus is a constellation. Its name refers to Cetus, a sea monster in Greek mythology, although it is often called 'the whale' today. Cetus is located in the region of the sky that contains other water-related constellations such as Aquarius, Pisces, and Eridanus.-Ecliptic:Although Cetus is not...
- The Saros number of the solar eclipseSolar eclipseAs seen from the Earth, a solar eclipse occurs when the Moon passes between the Sun and the Earth, and the Moon fully or partially blocks the Sun as viewed from a location on Earth. This can happen only during a new moon, when the Sun and the Moon are in conjunction as seen from Earth. At least...
series which began on 717 BC July and ended on 582 September. The duration of Saros series 73 was 1298.1 years, and it contained 73 solar eclipses.
- The number of secondSecondThe second is a unit of measurement of time, and is the International System of Units base unit of time. It may be measured using a clock....
s it took for the OV-099 shuttle to explode after launch.
- 73 is the length of the Arecibo messageArecibo messageThe Arecibo message was broadcast into space a single time via frequency modulated radio waves at a ceremony to mark the remodeling of the Arecibo radio telescope on 16 November 1974. It was aimed at the globular star cluster M13 some 25,000 light years away because M13 was a large and close...
, sent to space in search for extraterrestrial intelligence.
In Popular Culture
Dr. Sheldon CooperSheldon Cooper
Sheldon Lee Cooper, B.S., M.S., M.A., Ph.D., Sc.D. is a fictional character from Texas on the CBS television series The Big Bang Theory, portrayed by actor Jim Parsons...
in The Big Bang Theory
The Big Bang Theory
The Big Bang Theory is an American sitcom created by Chuck Lorre and Bill Prady, both of whom serve as executive producers on the show, along with Steven Molaro. All three also serve as head writers...
, played by actor Jim Parsons
Jim Parsons
James Joseph "Jim" Parsons is an American television and film actor. He is best known for playing Sheldon Cooper on the CBS sitcom The Big Bang Theory, with his performance often cited as a significant reason for the program's success...
, said "The best number is 73. Why? 73 is the 21st prime number. Its mirror (37) is the 12th and its mirror (21) is the product of multiplying, hang on to your hats, 7 and 3. ... In binary, 73 is a palindrome, 1001001 which backwards is 1001001."
Sheldon's roommate, Leonard Hofstadter
Leonard Hofstadter
Leonard Leakey Hofstadter, Ph.D., is a fictional character on the CBS television series The Big Bang Theory, portrayed by actor Johnny Galecki. Leonard is an experimental physicist from New Jersey who shares an apartment with colleague and best friend Sheldon Cooper...
, then quips that "73 is the Chuck Norris
Chuck Norris
Carlos Ray "Chuck" Norris is an American martial artist and actor. After serving in the United States Air Force, he began his rise to fame as a martial artist and has since founded his own school, Chun Kuk Do...
of numbers," to which Sheldon replies "Chuck Norris
Chuck Norris
Carlos Ray "Chuck" Norris is an American martial artist and actor. After serving in the United States Air Force, he began his rise to fame as a martial artist and has since founded his own school, Chun Kuk Do...
wishes. [...] All Chuck Norris backwards gets you is Sirron Kcuhc!"http://the-big-bang-theory.com/quotes/episode/410/
Sheldon's devotion to the number is illustrated in several further episodes, when he wears a t-shirt emblazoned with it, for example in The Roommate Transmogrification
The Roommate Transmogrification
"The Roommate Transmogrification" is the fourth season finale of the television series The Big Bang Theory that first aired on CBS on May 19, 2011. It is the twenty-fourth episode of the fourth season of the series and the eighty-seventh episode overall...
.
In other fields
Seventy-three is also:- The total number of books in the Holy Bible in the CatholicCatholicThe word catholic comes from the Greek phrase , meaning "on the whole," "according to the whole" or "in general", and is a combination of the Greek words meaning "about" and meaning "whole"...
version if the Book of Lamentations is counted as a book separate from the Book of Jeremiah. - The designation of USAUnited StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
Interstate 73Interstate 73Interstate 73 is a main route of the Interstate Highway System, currently located entirely within the U.S. state of North Carolina. It is part of a longer planned corridor, defined by various Federal laws to run from Myrtle Beach, South Carolina, to Grayling, Michigan, but only the part south of...
, a freeway in North CarolinaNorth CarolinaNorth Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...
. - The registry of the U.S. Navy's nuclear aircraft carrier USS George Washington (CVN-73)USS George Washington (CVN-73)USS George Washington is an American nuclear-powered supercarrier, the sixth ship in the Nimitz class and the fourth United States Navy ship to be named after George Washington, the first President of the United States...
, named after U.S. President George WashingtonGeorge WashingtonGeorge Washington was the dominant military and political leader of the new United States of America from 1775 to 1799. He led the American victory over Great Britain in the American Revolutionary War as commander-in-chief of the Continental Army from 1775 to 1783, and presided over the writing of...
. - The year AD 73, 73 BC73 BCYear 73 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Lucullus and Longinus...
, or 1973. - Amateur radio operatorAmateur radio operatorAn amateur radio operator is an individual who typically uses equipment at an amateur radio station to engage in two-way personal communications with other similar individuals on radio frequencies assigned to the amateur radio service. Amateur radio operators have been granted an amateur radio...
s often use the number 73 as an abbreviationMorse Code AbbreviationsMorse code abbreviations differ from prosigns for Morse Code in that they observe normal interletter spacing; that is, they are not "run together" the way prosigns are. From 1845 until well into the second half of the 20th century, commercial telegraphic code books were used to shorten telegrams, e.g...
for "best regards", typically when ending a QSOQ codeThe Q code is a standardized collection of three-letter message encodings, also known as a brevity code, all of which start with the letter "Q", initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio...
(a conversation with another ham). http://www.arrl.org/ham-radio-history In Morse codeMorse codeMorse code is a method of transmitting textual information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment...
, 73 is a palindrome (--··· ···--). - 7373 (magazine)73 Magazine was a United States-based amateur radio magazine that was published from 1960 to 2003. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, Wayne Green...
(also known as 73 Amateur Radio Today), was an amateur radioAmateur radioAmateur radio is the use of designated radio frequency spectrum for purposes of private recreation, non-commercial exchange of messages, wireless experimentation, self-training, and emergency communication...
magazine published from 1960 to 2003. - Each of the five seasons of the Discordian calendarDiscordian calendarThe Discordian or Erisian calendar is an alternative calendar used by some adherents of Discordianism. It is specified on page 00034 of the Principia Discordia.The Discordian year 1 YOLD is 1166 BC...
has 73 days. - No. 73No. 73No 73, later re-titled 7T3, was a British 1980s children's TV show produced by Television South for the ITV network. It was broadcast live on Saturday mornings and ran from 1982 to 1988...
was name of a 1980s children's television programme in the United Kingdom. It ran from 1982-1988 and starred Sandi ToksvigSandi ToksvigSandra Brigitte “Sandi” Toksvig is a Danish comedian, author and presenter on British radio and television.-Career:... - The Blues ImageThe Blues ImageBlues Image was a critically acclaimed late 1960s rock band. Their most successful song was "Ride Captain Ride" in the last half of 1970, which reached #4 on the both the Billboard Hot 100 and the Canadian RPM magazine charts. Blues Image was a well-respected band among their peers...
song "Ride Captain RideRide Captain Ride"Ride Captain Ride" is a song recorded by the American rock band Blues Image. The song was co-written by the band's singer-guitarist Mike Pinera and keyboardist Frank "Skip" Konte. It was included on the group's 1970 album, Open...
" (1970) begins with "73 men sailed out on the San Francisco BaySan Francisco BaySan Francisco Bay is a shallow, productive estuary through which water draining from approximately forty percent of California, flowing in the Sacramento and San Joaquin rivers from the Sierra Nevada mountains, enters the Pacific Ocean...
" - Singer Johnny MathisJohnny MathisJohn Royce "Johnny" Mathis is an American singer of popular music. Starting his career with singles of standards, he became highly popular as an album artist, with several dozen of his albums achieving gold or platinum status, and 73 making the Billboard charts...
has had 73 charted albums on Billboard Top 200 Charts - Pizza 73Pizza 73Pizza 73 is a delivery and take-out chain serving pizza and chicken wings, operated by Flying Pizza 73 Inc., a subsidiary of Pizza Pizza.Founded in 1985 by David Tougas and its current president Guy Goodwin, Pizza 73 is headquartered in Edmonton, Alberta, Canada and operates regionally in Western...
is a Canadian pizza chain with 51 stores - Game show Match Game '73Match GameMatch Game is an American television game show in which contestants attempted to match celebrities' answers to fill-in-the-blank questions...
in 1973 - The Felony SquadFelony SquadFelony Squad is a half-hour television crime drama originally broadcast on the ABC network from September 12, 1966 to January 31, 1969, a span encompassing seventy-three episodes.-Overview:...
aired on ABC from '66 - '69 for 73 episodes - The TV show Hope & FaithHope & FaithHope & Faith is an American sitcom that aired for three seasons on ABC from September 26, 2003, to May 2, 2006. For its first two seasons the show was part of a revived TGIF comedy block....
aired on ABC, 2003 - 2006 for 73 episodes - Fender Rhodes Stage 73 Piano
- Sonnet 73Sonnet 73Sonnet 73, one of William Shakespeare's most famous sonnets, focuses upon the theme of old age, with each of the three quatrains encompassing a metaphor...
by William Shakespeare - PT-73, the PT boatPT boatPT Boats were a variety of motor torpedo boat , a small, fast vessel used by the United States Navy in World War II to attack larger surface ships. The PT boat squadrons were nicknamed "the mosquito fleet". The Japanese called them "Devil Boats".The original pre–World War I torpedo boats were...
on TV's McHale's NavyMcHale's NavyMcHale's Navy is an American television sitcom series which ran for 138 half-hour episodes from October 11,1962, to August 31, 1966, on the ABC network. The series was filmed in black and white and originated in a one-hour drama called Seven Against the Sea, broadcast on April 3, 1962... - 73 is the current area of resistance to the downside of the iTraxx Europe Series 9 5y credit index. The number has taken on almost mythical status amongst the denizens of the financial community in London
- The number of the French department SavoieSavoieSavoie is a French department located in the Rhône-Alpes region in the French Alps.Together with the Haute-Savoie, Savoie is one of the two departments of the historic region of Savoy that was annexed by France on June 14, 1860, following the signature of the Treaty of Turin on March 24, 1860...
- On a CB radio, 10-73 means "speed trap at..."
- The favorite number of The Big Bang TheoryThe Big Bang TheoryThe Big Bang Theory is an American sitcom created by Chuck Lorre and Bill Prady, both of whom serve as executive producers on the show, along with Steven Molaro. All three also serve as head writers...
's character Sheldon CooperSheldon CooperSheldon Lee Cooper, B.S., M.S., M.A., Ph.D., Sc.D. is a fictional character from Texas on the CBS television series The Big Bang Theory, portrayed by actor Jim Parsons...
In sports
- In international curlingCurlingCurling is a sport in which players slide stones across a sheet of ice towards a target area. It is related to bowls, boule and shuffleboard. Two teams, each of four players, take turns sliding heavy, polished granite stones, also called "rocks", across the ice curling sheet towards the house, a...
competitions, each side is given 73 minutes to complete all of its throws. - The car number of former NASCARNASCARThe National Association for Stock Car Auto Racing is a family-owned and -operated business venture that sanctions and governs multiple auto racing sports events. It was founded by Bill France Sr. in 1947–48. As of 2009, the CEO for the company is Brian France, grandson of the late Bill France Sr...
driver Johnny BeauchampJohnny BeauchampJohnny Beauchamp was an American NASCAR driver from Harlan, Iowa. He is best known for finishing second in the 1959 Daytona 500 in a photo finish after being declared the unofficial winner...
. - The best-known car number of retired NASCAR driver Phil BarkdollPhil BarkdollPhil Barkdoll is a former NASCAR owner-driver from Phoenix, Arizona who only ran at two tracks in his entire career: Daytona International Speedway and Talladega Superspeedway.-NASCAR career:...
. - In baseballBaseballBaseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...
, the single-season home runHome runIn baseball, a home run is scored when the ball is hit in such a way that the batter is able to reach home safely in one play without any errors being committed by the defensive team in the process...
record set by Barry BondsBarry BondsBarry Lamar Bonds is an American former Major League Baseball outfielder. Bonds played from 1986 to 2007, for the Pittsburgh Pirates and San Francisco Giants. He is the son of former major league All-Star Bobby Bonds...
in 2001. - In basketballBasketballBasketball is a team sport in which two teams of five players try to score points by throwing or "shooting" a ball through the top of a basketball hoop while following a set of rules...
, the number of games the Philadelphia 76ersPhiladelphia 76ersThe Philadelphia 76ers are a professional basketball team based in Philadelphia, Pennsylvania. They play in the Atlantic Division of the Eastern Conference of the National Basketball Association . Originally known as the Syracuse Nationals, they are one of the oldest franchises in the NBA...
lost in the 1972-73 season (9-73), the most losses in NBANational Basketball AssociationThe National Basketball Association is the pre-eminent men's professional basketball league in North America. It consists of thirty franchised member clubs, of which twenty-nine are located in the United States and one in Canada...
history. - University of Texas football player Jonathan Scott wore #73
- NFL: New England PatriotsNew England PatriotsThe New England Patriots, commonly called the "Pats", are a professional football team based in the Greater Boston area, playing their home games in the town of Foxborough, Massachusetts at Gillette Stadium. The team is part of the East Division of the American Football Conference in the National...
John Hannah's retired #73 - NFL: New York JetsNew York JetsThe New York Jets are a professional football team headquartered in Florham Park, New Jersey, representing the New York metropolitan area. The team is a member of the Eastern Division of the American Football Conference in the National Football League...
Joe KleckoJoe KleckoJoseph Edward Klecko is a former American football player as a defensive lineman best remembered for his days as a member of the New York Jets' famed "New York Sack Exchange."-Temple University Owls:...
's retired #73 - NFL: In the 1940 NFL championship game, the Bears beat the Redskins 73-0, the largest score ever in an NFL game. (The Redskins won their previous regular season game, 7-3). For more details, see Wikipedia article 1940 NFL Championship Game1940 NFL Championship GameThe 1940 National Football League Championship Game, was the 8th in NFL history. The game was played at Griffith Stadium in Washington, D.C. on December 8, 1940. The Chicago Bears defeated the Washington Redskins, 73-0, the most one-sided victory in NFL history...