139517913 has 16 divisors (see below), whose sum is σ = 190088640. Its totient is φ = 91001856.

The previous prime is 139517909. The next prime is 139517933. The reversal of 139517913 is 319715931.

It is not a de Polignac number, because 139517913 - 2² = 139517909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139517933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23206 + ... + 28592.

It is an arithmetic number, because the mean of its divisors is an integer number (11880540).

Almost surely, 2^139517913 is an apocalyptic number.

It is an amenable number.

139517913 is a deficient number, since it is larger than the sum of its proper divisors (50570727).

139517913 is an equidigital number, since it uses as much as digits as its factorization.

139517913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576.

The product of its digits is 25515, while the sum is 39.

The square root of 139517913 is about 11811.7701044340. The cubic root of 139517913 is about 518.6527166873.

The spelling of 139517913 in words is "one hundred thirty-nine million, five hundred seventeen thousand, nine hundred thirteen".