# 37 (number)

Template:Infobox number
**37** (**thirty-seven**) is the natural number following 36 and preceding 38.

## In mathematics

Thirty-seven is the 12th prime number, the fifth lucky prime, the first irregular prime, the third unique prime and the third cuban prime of the form

37 is the smallest prime that is not also a supersingular prime. It is a centered hexagonal number and a star number.

37 and 38 are the first pair of consecutive positive integers not divisible by any of their digits.

Every positive integer is the sum of at most 37 fifth powers (see Waring's problem).

37 appears in the Padovan sequence, preceded by the terms 16, 21, and 28 (it is the sum of the first two of these).

Since the greatest prime factor of 37^{2} + 1 = 1370 is 137, which is obviously more than 37 twice, 37 is a Størmer number.

37 is the only two digit number in base 10 whose product, when multiplied by two, subtracted by one, and then read backwards, equals the original two digit number: 37×2=74, 74-1=73, 73 backwards is 37.

37 is the only two digit number in base 10 with the following property: The difference between the two digits equals the square root of the difference between the number itself and the least common multiple of the two digits.

## In science

- The atomic number of rubidium.
- The normal human body temperature in degrees Celsius.

### Astronomy

- Messier object M37, a magnitude 6.0 open cluster in the constellation Auriga
- The New General Catalogue object NGC 37, a spiral galaxy in the constellation Phoenix
- The Saros number of the solar eclipse series which began on -1794 June 25 and ended on -496 August 12. The duration of Saros series 37 was 1298.1 years, and it contained 73 solar eclipses.
- The Saros number of the lunar eclipse series which began on -1492 April 3 and ended on -194 May 22. The duration of Saros series 37 was 1298.1 years, and it contained 73 lunar eclipses.
- Kepler-37b is the smallest known planet.

## In sports

The jersey number 37 has been retired by several North American sports teams in honor of past greats:

- In Major League Baseball:
- The New York Mets, for Hall of Fame manager Casey Stengel, who was the team's first manager.
- The New York Yankees, also for Stengel. This honor made him the first manager to have had his number retired by two different teams (the Mets in 1965, the Yankees in 1970).

- In the NFL:
- The Detroit Lions, for Doak Walker.
- The San Francisco 49ers, for Jimmy Johnson (not to be confused with the coach of the same name).

## In other fields

**Thirty-seven** is:

- The number of plays William Shakespeare is thought to have written (counting
*Henry IV*as three parts).^{[1]} - The number of the French department Indre-et-Loire
- The number of slots in European Roulette (numbered 0 to 36, the 00 is not used in European roulette as it is in American roulette)
- The number of Great Nats traditionally worshiped in Burma.
- Municipal Okrug #37, name of Yugo-Zapad Municipal Okrug of Krasnoselsky District of Saint Petersburg, Russia, before 2009
- +37 was the international dialing code of the German Democratic Republic (aka East Germany). Today the +37 prefix is shared by Lithuania (+370), Latvia (+371), Estonia (+372), Moldova (+373), Armenia (+374), Belarus (+375), Andorra (+376), Monaco (+377), San Marino (+378) and Vatican City (+379).
- A television channel reserved for radioastronomy in the United States
- The protagonist in the book
*This Number Speaks*(Publish America 2008) by Jason Patrick Doherty, is named Thirty-Seven. - The number people are most likely to state when asked to give a random number between 0 and 100.
^{[2]}

## See also

## References

- ↑ Adam Spencer,
*Adam Spencer's Book of Numbers*. New York: Four Walls Eight Windows (2004): 61 - ↑ http://catb.org/jargon/html/R/random-numbers.html