139707931 has 24 divisors (see below), whose sum is σ = 164239040. Its totient is φ = 118396080.

The previous prime is 139707901. The next prime is 139707937.

It is a happy number.

139707931 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 139707931 - 2⁵ = 139707899 is a prime.

It is a super-2 number, since 2×139707931² = 39036611968601522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139707937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153580 + ... + 154486.

Almost surely, 2^139707931 is an apocalyptic number.

139707931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139707931 is a deficient number, since it is larger than the sum of its proper divisors (24531109).

139707931 is a wasteful number, since it uses less digits than its factorization.

139707931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 35721, while the sum is 40.

The square root of 139707931 is about 11819.8109544950. The cubic root of 139707931 is about 518.8880715166. Note that the first 3 decimals are identical.

The spelling of 139707931 in words is "one hundred thirty-nine million, seven hundred seven thousand, nine hundred thirty-one".