139 is a 3-digit prime number. 139 has 2 factors, 1 and 139. It is the 34th prime number, and the ninth prime number from 101-200.
Proofs[]
— 139 is divisible by 1.
— 139 is not divisible by 2-138.
- — 139 is divisible by 139.
Therefore, 139 is a prime number.
As an Exponent of Mersenne Number[]
2139 - 1 is divisible by 5,625,767,248,687, and is therefore not a prime number.
Relationship with other odd numbers[]
The numbers before[]
- 131 is the second previous prime number.
- 133 is a composite number. Its prime factorization is 7 × 19.
- 135 is also a composite number. Its prime factorization is 33 × 5.
- 137 is the prime number preceding 139.
- The difference between 139 and 137 is 2. Therefore, they are twin primes.
The numbers after[]
- 141 is a composite number. Its prime factorization is 3 × 47.
- 143 is also a composite number. Its prime factorization is 11 × 13.
- 145 is yet another composite number. Its prime factorization is 5 × 29.
- 147 is unsurprisingly a composite number. Its prime factorization is 3 × 72.
- 149 is the prime number following 139.
- 151 is the prime number following 149.
Trivia[]
- 139 is the smallest prime number before a prime gap of length 10.
- 139 is a Chen prime, since 139 + 2 = 141 is a semiprime.
- 139 is the smallest factor of the smallest prime-indexed Lucas number that is not prime, which is 64,079.
- 139 is the sum of five consecutive prime numbers (19 + 23 + 29 + 31 + 37).