631874979 has 8 divisors (see below), whose sum is σ = 936111120. Its totient is φ = 421249968.

The previous prime is 631874959. The next prime is 631874983. The reversal of 631874979 is 979478136.

It is a happy number.

631874979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631874979 - 2²⁸ = 363439523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631874959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11701362 + ... + 11701415.

It is an arithmetic number, because the mean of its divisors is an integer number (117013890).

Almost surely, 2^631874979 is an apocalyptic number.

631874979 is a deficient number, since it is larger than the sum of its proper divisors (304236141).

631874979 is a wasteful number, since it uses less digits than its factorization.

631874979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23402786 (or 23402780 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 631874979 is about 25137.1235227900. The cubic root of 631874979 is about 858.1114946312. Note that the first 3 decimals are identical.

The spelling of 631874979 in words is "six hundred thirty-one million, eight hundred seventy-four thousand, nine hundred seventy-nine".