631685204 has 12 divisors (see below), whose sum is σ = 1109441844. Its totient is φ = 314701824.

The previous prime is 631685189. The next prime is 631685207. The reversal of 631685204 is 402586136.

It can be written as a sum of positive squares in 2 ways, for example, as 364428100 + 267257104 = 19090^2 + 16348^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631685207) 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, 283949 + ... + 286164.

It is an arithmetic number, because the mean of its divisors is an integer number (92453487).

Almost surely, 2^631685204 is an apocalyptic number.

It is an amenable number.

631685204 is a deficient number, since it is larger than the sum of its proper divisors (477756640).

631685204 is a wasteful number, since it uses less digits than its factorization.

631685204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570394 (or 570392 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 631685204 is about 25133.3484438505. The cubic root of 631685204 is about 858.0255786826.

The spelling of 631685204 in words is "six hundred thirty-one million, six hundred eighty-five thousand, two hundred four".