93 (number)
Encyclopedia
93 is the natural number
following 92
and preceding 94
.
and the ninth of the form (3.q). The aliquot sum of 93 is 35 within the aliquot sequence
(93,35,13,1,0) 93 being the fourth composite number
in the 13-aliquot tree.
93 is the first number in the third triplet of three consecutive distinct semiprime
s, 93, 94 and 95.
Since its two prime factors, 3 and 31 are both Gaussian primes, this means that 93 is a Blum integer
.
Given 93 the Mertens function returns 0
.
There are 93 solutions to Znám's problem
for length 8.
93 is a repdigit
in base 5 (333).
In astronomy
,
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 92
92 (number)
92 is the natural number following 91 and preceding 93.- In mathematics:Ninety-two is a pentagonal number.There are 92 Johnson solids...
and preceding 94
94 (number)
94 is the natural number following 93 and preceding 95.-In mathematics:Ninety-four is the twenty-ninth distinct semiprime and the fourteenth of the form...
.
In mathematics
Ninety-three is the twenty-eighth distinct semiprimeSemiprime
In mathematics, a semiprime is a natural number that is the product of two prime numbers. The first few semiprimes are 4, 6, 9, 10, 14, 15, 21, 22, 25, 26, ... ....
and the ninth of the form (3.q). The aliquot sum of 93 is 35 within the aliquot sequence
Aliquot sequence
In mathematics, an aliquot sequence is a recursive sequence in which each term is the sum of the proper divisors of the previous term. The aliquot sequence starting with a positive integer k can be defined formally in terms of the sum-of-divisors function σ1 in the following way:For example, the...
(93,35,13,1,0) 93 being the fourth composite number
Composite number
A 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....
in the 13-aliquot tree.
93 is the first number in the third triplet of three consecutive distinct semiprime
Semiprime
In mathematics, a semiprime is a natural number that is the product of two prime numbers. The first few semiprimes are 4, 6, 9, 10, 14, 15, 21, 22, 25, 26, ... ....
s, 93, 94 and 95.
Since its two prime factors, 3 and 31 are both Gaussian primes, this means that 93 is a Blum integer
Blum integer
In mathematics, a natural number n is a Blum integer if n = p×q is a semiprime for which p and q are distinct prime numbers congruent to 3 mod 4. That is, p and q must be of the form 4t+3, for some integer t. Primes of this form are referred to as Blum primes. This means that the factors of a Blum...
.
Given 93 the Mertens function returns 0
0 (number)
0 is both a numberand the numerical digit used to represent that number in numerals.It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems...
.
There are 93 solutions to Znám's problem
Znám's problem
In number theory, Znám's problem asks which sets of k integers have the property that each integer in the set is a proper divisor of the product of the other integers in the set, plus 1. Znám's problem is named after the Slovak mathematician Štefan Znám, who suggested it in 1972, although other...
for length 8.
93 is a repdigit
Repdigit
In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit, most often in the decimal numeral system....
in base 5 (333).
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 neptuniumNeptuniumNeptunium is a chemical element with the symbol Np and atomic number 93. A radioactive metal, neptunium is the first transuranic element and belongs to the actinide series. Its most stable isotope, 237Np, is a by-product of nuclear reactors and plutonium production and it can be used as a...
, an actinide.
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...
M93Messier 93Messier 93 is an open cluster in the constellation Puppis. It was discovered by Charles Messier in 1781....
, a magnitude 6.5 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....
PuppisPuppisPuppis is a constellation in the southern sky. Its name is the Latin word for the poop deck of a ship, and Puppis represents the deck of the ship and its deckhouses...
- 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 93, a magnitude 13.3 spiral galaxySpiral galaxyA spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as...
in the constellation AndromedaAndromeda (constellation)Andromeda is a constellation in the northern sky. It is named after Andromeda, the princess in the Greek legend of Perseus who was chained to a rock to be eaten by the sea monster Cetus...
- 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 August 9, 29 BC and ended on 1287 October. The duration of Saros series 93 was 1316.2 years, and it contained 74 solar eclipses.
- The Saros number of the lunar eclipseLunar eclipseA lunar eclipse occurs when the Moon passes behind the Earth so that the Earth blocks the Sun's rays from striking the Moon. This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a...
series which began on 291 May and ended on 1571 July. The duration of Saros series 93 was 1280.1 years, and it contained 72 lunar eclipses.
In other fields
Ninety-three is also:- The year AD 9393Year 93 was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Pompeius and Priscinus...
, 93 BC93 BCYear 93 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Flaccus and Herennius...
, or 1993. - Ninety-ThreeNinety-ThreeNinety-Three is the last novel by the French writer Victor Hugo. Published in 1874, shortly after the bloody upheaval of the Paris Commune, the novel concerns the Revolt in the Vendée and Chouannerie – the counter-revolutionary revolts in 1793 during the French Revolution...
(Quatrevingt-treize), a novel concerning the French RevolutionFrench RevolutionThe French Revolution , sometimes distinguished as the 'Great French Revolution' , was a period of radical social and political upheaval in France and Europe. The absolute monarchy that had ruled France for centuries collapsed in three years...
by Victor HugoVictor HugoVictor-Marie Hugo was a Frenchpoet, playwright, novelist, essayist, visual artist, statesman, human rights activist and exponent of the Romantic movement in France.... - American Interstate 93Interstate 93Interstate 93 is an Interstate Highway in the New England section of the United States. Its southern terminus is in Canton, Massachusetts, in the Boston metropolitan area, at Interstate 95; its northern terminus is near St. Johnsbury, Vermont, at Interstate 91...
, a freeway that runs from MassachusettsMassachusettsThe Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...
to VermontVermontVermont is a state in the New England region of the northeastern United States of America. The state ranks 43rd in land area, , and 45th in total area. Its population according to the 2010 census, 630,337, is the second smallest in the country, larger only than Wyoming. It is the only New England...
, and U.S. Route 93U.S. Route 93U.S. Route 93 is a major north–south United States highway in the western United States. The southern terminus is at U.S. Route 60 in Wickenburg, Arizona. The northern terminus is at the Canadian border north of Eureka in Lincoln County, Montana, where the roadway continues into Roosville,...
, a north-south highway in the Western United States, extending between the Canadian border in Montana, and Wickenburg, Arizona. - The code for international direct dial phone calls to AfghanistanAfghanistanAfghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...
. - The number of United Airlines Flight 93United Airlines Flight 93United Airlines Flight 93 was United Airlines' scheduled morning transcontinental flight across the United States from Newark International Airport in Newark, New Jersey, to San Francisco International Airport in California. On Tuesday, September 11, 2001, the Boeing 757–222 aircraft operating the...
, which crashed in PennsylvaniaPennsylvaniaThe Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...
, USA on September 11, 2001. - A greeting among ThelemitesThelemaThelema is a religious philosophy that was established, defined and developed by the early 20th century British writer and ceremonial magician, Aleister Crowley. He believed himself to be the prophet of a new age, the Æon of Horus, based upon a religious experience that he had in Egypt in 1904...
, 9393 (Thelema)The number 93 is of great significance in Thelema, a religious philosophy founded by English author and occultist Aleister Crowley in 1904 with the writing of The Book of the Law ....
is the numerologicalNumerologyNumerology is any study of the purported mystical relationship between a count or measurement and life. It has many systems and traditions and beliefs...
value of Thelema (Will) and Agape (Love) in Greek letters. - One of two ISBN Group Identifiers for books published in IndiaIndiaIndia , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
. - The number of the French department Seine-Saint-DenisSeine-Saint-Denis- Culture :A number of hip hop artists come from the Seine-Saint-Denis, including one of the first major hip-hop groups in France, NTM, as well as Lord Kossity, or more recent acts such as Tandem or Sefyu.- Miscellaneous topics :...
, and as such used by many French gangsta rapGangsta rapGangsta Rap is a subgenre of hip hop music that evolved from hardcore hip hop and purports to reflect urban crime and the violent lifestyles of inner-city youths. Lyrics in gangsta rap have varied from accurate reflections to fictionalized accounts. Gangsta is a non-rhotic pronunciation of the word...
pers and those emulating their speech. - Babia 93, an album from a Pakistani pop singer Sajjad AliSajjad AliSajjad Ali is a Pakistani semi-classical, pop singer, film actor, director and producer. He is trained in classical singing.- Early life and education :...
- LondonLondonLondon is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...
's 93 Feet East93 Feet East93 Feet East is a live music venue on Brick Lane in East London. It is a conversion of part of the Old Truman Brewery, and plays host to new and established acts. It has a courtyard with a BBQ.-External links:**...
music venue - Los AngelesLos ÁngelesLos Ángeles is the capital of the province of Biobío, in the commune of the same name, in Region VIII , in the center-south of Chile. It is located between the Laja and Biobío rivers. The population is 123,445 inhabitants...
93 KHJ radio - STS-93STS-93STS-93 marked the 95th launch of the Space Shuttle, the 26th launch of Columbia, and the 21st night launch of a Space Shuttle. Eileen Collins became the first female shuttle Commander on this flight. Its primary payload was the Chandra X-ray Observatory. It would also be the last mission of...
was the mission of the Space Shuttle ColumbiaSpace Shuttle ColumbiaSpace Shuttle Columbia was the first spaceworthy Space Shuttle in NASA's orbital fleet. First launched on the STS-1 mission, the first of the Space Shuttle program, it completed 27 missions before being destroyed during re-entry on February 1, 2003 near the end of its 28th, STS-107. All seven crew...
launched July 23, 1999. - Tales From the CryptTales from the Crypt (TV series)Tales from the Crypt, sometimes titled HBO's Tales from the Crypt, is an American horror anthology television series that ran from 1989 to 1996 on the premium cable channel HBO...
ran on HBO for 93 episodes from 1989 - 1996. - The sun is approximately 93 million miles away from the Earth
- William ShakespeareWilliam ShakespeareWilliam Shakespeare was an English poet and playwright, widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet and the "Bard of Avon"...
's Sonnet 93Sonnet 93Sonnet 93 is one of 154 sonnets written by the English playwright and poet William Shakespeare. It's a member of the Fair Youth sequence, in which the poet expresses his love towards a young man.-Synopsis:... - Rhode IslandRhode IslandThe state of Rhode Island and Providence Plantations, more commonly referred to as Rhode Island , is a state in the New England region of the United States. It is the smallest U.S. state by area...
Senator Theodore Francis Green (1867–1966) was 93 when he retired, and at the time, the oldest man ever to serve in the United States CongressUnited States CongressThe United States Congress is the bicameral legislature of the federal government of the United States, consisting of the Senate and the House of Representatives. The Congress meets in the United States Capitol in Washington, D.C.... - Strom ThurmondStrom ThurmondJames Strom Thurmond was an American politician who served as a United States Senator. He also ran for the Presidency of the United States in 1948 as the segregationist States Rights Democratic Party candidate, receiving 2.4% of the popular vote and 39 electoral votes...
, among the longest-serving senators in Congress history, won reelection at 93. - The Saab 93Saab 93The Saab 93, pronounced ninety-three, is an automobile manufactured by Saab. It was announced on August 18, 1955, and was first presented on December 1, 1955. It was styled by Sixten Sason and had a longitudinally-mounted three-cylinder 748 cc Saab two-stroke engine giving 33 hp . The...
, a car produced from 1950–1960 - The Saab 9-3Saab 9-3The first generation 9-3, a substantially improved 'new-generation' Saab 900 was launched in 1998 for the 1999 model year. Saab claimed that 1,100 changes were made, including a revised suspension in an attempt to tighten up the handling characteristics of its predecessor, the Saab 900...
, a car produced from 1998–Present, designed to replace the Saab 900Saab 900The Saab 900 was a car produced by Saab Automobile from 1978 until 1998 in two generations. The first generation from 1978 to 1993 is known as the "classic"; the generation from 1994 to 1998 is known as the "new generation" ....
. - September 3 (the 3rd day of the 9th month) is ChinaChinaChinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
's Victory over Japan Day. There are still many September 3 streets and primary schools in China.
In sports
- Pittsburgh SteelersSteelersSteelers usually refers to the Pittsburgh Steelers, an American football team which plays in the National Football League. It may also refer to the following sports teams:Association football...
' Andy Russell made a 93-yard fumbleFumbleA fumble in American and Canadian football occurs when a player, who has possession and control of the ball loses it before being downed or scoring. By rule, it is any act other than passing, kicking or successful handing that results in loss of player possession...
return for a touchdownTouchdownA touchdown is a means of scoring in American and Canadian football. Whether running, passing, returning a kickoff or punt, or recovering a turnover, a team scores a touchdown by advancing the ball into the opponent's end zone.-Description:...
against the Baltimore ColtsIndianapolis ColtsThe Indianapolis Colts are a professional American football team based in Indianapolis. They are currently members of the South Division of the American Football Conference in the National Football League ....
during the December 27, 1975 AFCAmerican Football ConferenceThe American Football Conference is one of the two conferences of the National Football League . This conference and its counterpart, the National Football Conference , currently contain 16 teams each, making up the 32 teams of the NFL....
Playoff game. This NFL-record fumble return was voted the 7th greatest play in Three Rivers StadiumThree Rivers StadiumThree Rivers Stadium was a multi-purpose stadium located in Pittsburgh, Pennsylvania from 1970 to 2000. It was home to the Pittsburgh Pirates and the Pittsburgh Steelers, the city's Major League Baseball franchise and National Football League franchise respectively.Built as a replacement to...
history. - Estelle Frendberg ran the Senior Olympics for 18 years. At 93, in 2005, she won 2 gold medals, setting a world record of 7 minutes, 10.84 seconds in the 800-meter run. She was chosen by the USA Track and Field Association as an Athlete of the Year.