631138604 has 12 divisors (see below), whose sum is σ = 1104977664. Its totient is φ = 315430704.

The previous prime is 631138601. The next prime is 631138609. The reversal of 631138604 is 406831136.

631138604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (631138601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24044 + ... + 42899.

It is an arithmetic number, because the mean of its divisors is an integer number (92081472).

Almost surely, 2^631138604 is an apocalyptic number.

It is an amenable number.

631138604 is a deficient number, since it is larger than the sum of its proper divisors (473839060).

631138604 is a wasteful number, since it uses less digits than its factorization.

631138604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69304 (or 69302 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 631138604 is about 25122.4720917349. The cubic root of 631138604 is about 857.7780228228.

It can be divided in two parts, 63113 and 8604, that added together give a palindrome (71717).

The spelling of 631138604 in words is "six hundred thirty-one million, one hundred thirty-eight thousand, six hundred four".