139

Number
$139$ (one hundred and thirty-nine) is:


 * The $34$th prime number


 * The $2$nd of the $11$th pair of twin primes, with $137$


 * The $9$th of $11$ primes of the form $2 x^2 + 11$:
 * $2 \times 8^2 + 11 = 139$


 * The smaller of the smallest pair of primes whose prime gap is $10$:
 * $149 - 139 = 10$

Also see