139 (number)
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| Cardinal | 139 One hundred [and] thirty-nine. |
| Ordinal | 139th One hundred [and] thirty-ninth. |
| Factorization | prime |
| Divisors | 1, 139 |
| Roman numeral | CXXXIX |
| Binary | 10001011 |
| Octal | 213 |
| Hexadecimal | 8B |
139 (One hundred [and] thirty-nine) is the natural number following 138 and preceding 140.
[edit] In mathematics
One hundred [and] thirty-nine is the 34th prime number, so it is divisible only by itself and 1. It is a twin prime with 137. Because 141 is a semiprime, 139 is a Chen prime.
139 is a strictly non-palindromic number.
This number is the sum of five consecutive prime numbers (19 + 23 + 29 + 31 + 37).
It is the smallest factor of 64079, the smallest composite Lucas number with a prime index.
[edit] In other fields
One hundred [and] thirty-nine is also:
