139 (number) explained

Number:	139
Factorization:	prime
Prime:	34th
Divisor:	1, 139

139 (one hundred [and] thirty-nine) is the natural number following 138 and preceding 140.

In mathematics

139 is the 34th prime number. It is a twin prime with 137. Because 141 is a semiprime, 139 is a Chen prime. 139 is the smallest prime before a prime gap of length 10.^[1]

This number is the sum of five consecutive prime numbers (19 + 23 + 29 + 31 + 37).

It is the smallest factor of 64079 which is the smallest Lucas number with prime index which is not prime. It is also the smallest factor of the first nine terms of the Euclid–Mullin sequence, making it the tenth term.

139 is a happy number^[2] and a strictly non-palindromic number.^[3]

In the military

RUM-139 VL-ASROC is a United States Navy ASROC anti-submarine missile
was a United States Navy Admirable-class minesweeper during World War II
was a United States Navy Haskell-class attack transport during World War II
was a United States Navy destroyer during World War II
was a United States Navy transport ship during World War I and World War II
was a tanker loaned to the Soviet Union during World War II, then returned to the United States in 1944
was a United States Navy cargo ship during World War II
was a United States Navy Des Moines-class heavy cruiser following World War II
was a United States Navy Wickes-class destroyer during World War II

In transportation

British Rail Class 139 is the TOPS classification assigned to the lightweight railcars by West Midlands Trains on the Stourbridge Town Branch Line
Fiat M139 platform is the next-generation premium rear wheel drive automobile platform from Fiat
London Buses route 139 is a Transport for London contracted bus route in London

In other fields

139 is also:

The year AD 139 or 139 BC
139 AH is a year in the Islamic calendar that corresponds to 756 - 757 CE.
139 Juewa is a large and dark main belt asteroid discovered in 1874
The atomic number of untriennium, an unsynthesized chemical element
Gull Lake No. 139 is a rural municipality in Saskatchewan, Canada
Sonnet 139 by William Shakespeare
139 Rb Gahhie is a village in Chak Jhumra Tehsil in the Punjab province of Pakistan
Miss 139 was a 1921 film starring Diana Allen and Marc McDermott
Motorola C139 model cellphone

References

Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 139
Web site: Sloane's A007770 : Happy numbers. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-05-27.
Web site: Sloane's A016038 : Strictly non-palindromic numbers. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-05-27.

External links

Psalm 139