39 (thirty-nine) is the

natural number In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called '' cardinal ...

following 38 and preceding 40.

In mathematics

*39 is the sum of five consecutive primes (3 + 5 + 7 + 11 + 13) and also is the product of the first and the last of those consecutive primes. Among small semiprimes only three other integers (10, 155, and 371) share this attribute. 39 also is the sum of the first three powers of 3 (3 + 3 + 3). Given 39, the Mertens function returns 0. *39 is the smallest natural number which has three partitions into three parts which all give the same product when multiplied: , , . *39 is the 12th distinct

semiprime In mathematics, a semiprime is a natural number that is the product of exactly two prime numbers. The two primes in the product may equal each other, so the semiprimes include the squares of prime numbers. Because there are infinitely many prime ...

and the 4th in the family. It is the last member of the third distinct semiprime pair (38,39). *39 has an aliquot sum of 17 which is a prime. 39 is the 4th member of the 17-aliquot tree. It is a

perfect totient number In number theory, a perfect totient number is an integer that is equal to the sum of its iterated totients. That is, we apply the totient function to a number ''n'', apply it again to the resulting totient, and so on, until the number 1 is reached, ...

. *The thirteenth Perrin number is 39, which comes after 17, 22, 29 (it is the sum of the first two mentioned). *Since the greatest prime factor of 39² + 1 = 1522 is 761, which is more than 39 twice, 39 is a Størmer number. *The F26A graph is a symmetric graph with 39 edges.

In science

*The

atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of ever ...

yttrium Yttrium is a chemical element with the symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a " rare-earth element". Yttrium is almost always found in co ...

Astronomy

Messier object The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ''Catalogue des Nébuleuses et des Amas d'Étoiles'' (''Catalogue of Nebulae and Star Clusters''). Because Messier was only in ...

Open Cluster M39, a magnitude 5.5

open cluster An open cluster is a type of star cluster made 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, an ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the earliest constellation ...

Cygnus *The

New General Catalogue The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...

object

NGC 39 NGC 39 (also known as UGC 114, MCG 5-1-52, ZWG 499.76 or PGC 852) is an unbarred spiral galaxy Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''spiral galaxy Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Andromeda

In religion

*The number of the

39 categories of activity prohibited on Shabbat 39 may refer to: * 39 (number), the natural number following 38 and preceding 40 * one of the years: ** 39 BC ** AD 39 ** 1939 ** 2039 * ''39'' (album), a 2000 studio album by Mikuni Shimokawa * " '39", a 1975 song by Queen * "Thirty Nine", a son ...

according to

Halakha ''Halakha'' (; he, הֲלָכָה, ), also transliterated as ''halacha'', ''halakhah'', and ''halocho'' ( ), is the collective body of Jewish religious laws which is derived from the written and Oral Torah. Halakha is based on biblical commandm ...

*The number of mentions of work or labor in the

Torah The Torah (; hbo, ''Tōrā'', "Instruction", "Teaching" or "Law") is the compilation of the first five books of the Hebrew Bible, namely the books of Genesis, Exodus, Leviticus, Numbers and Deuteronomy. In that sense, Torah means the ...

*The actual number of lashes given by the

Sanhedrin The Sanhedrin ( Hebrew and Aramaic: סַנְהֶדְרִין; Greek: , '' synedrion'', 'sitting together,' hence ' assembly' or 'council') was an assembly of either 23 or 71 elders (known as " rabbis" after the destruction of the Second Temp ...

to a person meted the punishment of 40 lashes *The number of books in the

Old Testament The Old Testament (often abbreviated OT) is the first division of the Christian biblical canon, which is based primarily upon the 24 books of the Hebrew Bible or Tanakh, a collection of ancient religious Hebrew writings by the Israelites. The ...

according to

Protestant Protestantism is a Christian denomination, branch of Christianity that follows the theological tenets of the Reformation, Protestant Reformation, a movement that began seeking to reform the Catholic Church from within in the 16th century agai ...

canon *The number of statements on

Anglican Church Anglicanism is a Western Christian tradition that has developed from the practices, liturgy, and identity of the Church of England following the English Reformation, in the context of the Protestant Reformation in Europe. It is one of the ...

doctrine,

Thirty-Nine Articles The Thirty-nine Articles of Religion (commonly abbreviated as the Thirty-nine Articles or the XXXIX Articles) are the historically defining statements of doctrines and practices of the Church of England with respect to the controversies of the ...

In other fields

Arts and entertainment

*In the title of the

John Buchan John Buchan, 1st Baron Tweedsmuir (; 26 August 1875 – 11 February 1940) was a Scottish novelist, historian, and Unionist politician who served as Governor General of Canada, the 15th since Canadian Confederation. After a brief legal career ...

novel A novel is a relatively long work of narrative fiction, typically written in prose and published as a book. The present English word for a long work of prose fiction derives from the for "new", "news", or "short story of something new", itself ...

and subsequent films (one by

Alfred Hitchcock Sir Alfred Joseph Hitchcock (13 August 1899 – 29 April 1980) was an English filmmaker. He is widely regarded as one of the most influential figures in the history of cinema. In a career spanning six decades, he directed over 50 featur ...

), '' The Thirty-Nine Steps'' *The age American comedian

Jack Benny Jack Benny (born Benjamin Kubelsky, February 14, 1894 – December 26, 1974) was an American entertainer who evolved from a modest success playing violin on the vaudeville circuit to one of the leading entertainers of the twentieth century wit ...

claimed to be for more than 40 years *"39" is a song by

The Cure The Cure are an English rock band formed in 1978 in Crawley, West Sussex. Throughout numerous lineup changes since the band's formation, guitarist, lead vocalist, and songwriter Robert Smith has remained the only constant member. The band's ...

on their album '' Bloodflowers'' *"39" is a song by

Tenacious D Tenacious D is an American comedy rock duo formed in Los Angeles, California in 1994. It was founded by actors Jack Black and Kyle Gass, who were members of The Actors' Gang theater company at the time. The duo's name is derived from "ten ...

on their album '' Rize of the Fenix'' *"

'39 "39" is a song by British rock band Queen. Composed by lead guitarist Brian May, it is the fifth track on their fourth studio album '' A Night at the Opera''. The song was also the B-side to " You're My Best Friend". The song relates the tale ...

" is a song by

Queen Queen or QUEEN may refer to: Monarchy * Queen regnant, a female monarch of a Kingdom ** List of queens regnant * Queen consort, the wife of a reigning king * Queen dowager, the widow of a king * Queen mother, a queen dowager who is the mother ...

on their album '' A Night at the Opera'' *The book series '' The 39 Clues'' revolves around 39 clues hidden around the world *'' Glorious 39'' is a 2009

drama film In film and television, drama is a category or genre of narrative fiction (or semi-fiction) intended to be more serious than humorous in tone. Drama of this kind is usually qualified with additional terms that specify its particular super- ...

set at the beginning of

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

*In the CBS

reality show Reality television is a genre of television programming that documents purportedly unscripted real-life situations, often starring unfamiliar people rather than professional actors. Reality television emerged as a distinct genre in the early 19 ...

'' Survivor'', contestants compete for 39 days *The number of episodes done during its one season in 1955–1956 of ''

The Honeymooners ''The Honeymooners'' is an American television sitcom which originally aired from 1955 to 1956, created by and starring Jackie Gleason, and based on a recurring comedy sketch of the same name that had been part of Gleason's variety show. It fo ...

'' television series is commonly referred to as the " Classic 39" * Japanese wordplay and slang: **Internet chat slang for "Thank You" when written with numbers (3=San, 9=Kyuu) **This number is also considered to be the lucky number of

Hatsune Miku , also called Miku Hatsune, and officially code-named CV01, is a Vocaloid software voicebank developed by Crypton Future Media and its official anthropomorphic mascot character, a 16-year-old girl with long, turquoise twintails. Miku's pers ...

due to the digits 3 and 9 being pronounceable as "mi" and "ku", respectively.

History

*The number of signers to the

United States Constitution The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, in 1789. Originally comprising seven articles, it delineates the natio ...

, out of 55 members of the Philadelphia Convention delegates *The traditional number of times citizens of

Ancient Rome In modern historiography, ancient Rome refers to Roman people, Roman civilisation from the founding of the city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom ...

hit their

slaves Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...

when beating them, referred to as " Forty save

one 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...

" *The duration, in nanoseconds, of the nuclear reaction in the largest nuclear explosion ever performed (

Tsar Bomba The Tsar Bomba () ( code name: ''Ivan'' or ''Vanya''), also known by the alphanumerical designation "AN602", was a thermonuclear aerial bomb, and the most powerful nuclear weapon ever created and tested. Overall, the Soviet physicist Andrei ...

) *The number of

Scud A Scud missile is one of a series of tactical ballistic missiles developed by the Soviet Union during the Cold War. It was exported widely to both Second and Third World countries. The term comes from the NATO reporting name attached to the m ...

missiles which

Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...

fired at

Israel Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated ...

during the

Gulf War The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...

in 1991 *Number of bodies found in a refrigerated articulated lorry in Grays, Essex, United Kingdom 2019 *The code for international direct-dialed phone calls to

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

* Pier 39 in

San Francisco San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17t ...

*The number of the French department Jura *In

Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is borde ...

, the number 39 is considered unlucky, due to the belief that it is associated with

pimp Procuring or pandering is the facilitation or provision of a prostitute or other sex worker in the arrangement of a sex act with a customer. A procurer, colloquially called a pimp (if male) or a madam (if female, though the term pimp has still ...

s. See Curse of 39. *The

bowling Bowling is a target sport and recreational activity in which a player rolls a ball toward pins (in pin bowling) or another target (in target bowling). The term ''bowling'' usually refers to pin bowling (most commonly ten-pin bowling), though ...

lane normally consists of 39 wooden boards

References

{{Integers, zero Integers