139837631 has 16 divisors (see below), whose sum is σ = 156074688. Its totient is φ = 124608000.

The previous prime is 139837609. The next prime is 139837637. The reversal of 139837631 is 136738931.

139837631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139837631 - 2²⁶ = 72728767 is a prime.

It is a super-2 number, since 2×139837631² = 39109126087384322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139837637) 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, 37721 + ... + 41261.

It is an arithmetic number, because the mean of its divisors is an integer number (9754668).

Almost surely, 2^139837631 is an apocalyptic number.

139837631 is a deficient number, since it is larger than the sum of its proper divisors (16237057).

139837631 is a wasteful number, since it uses less digits than its factorization.

139837631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682.

The product of its digits is 81648, while the sum is 41.

The square root of 139837631 is about 11825.2962330759. The cubic root of 139837631 is about 519.0485944181.

The spelling of 139837631 in words is "one hundred thirty-nine million, eight hundred thirty-seven thousand, six hundred thirty-one".