631888957 has 12 divisors (see below), whose sum is σ = 735610080. Its totient is φ = 541209816.

The previous prime is 631888951. The next prime is 631888969. The reversal of 631888957 is 759888136.

It is not a de Polignac number, because 631888957 - 2²³ = 623500349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631888898 and 631888907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631888951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73288 + ... + 81454.

It is an arithmetic number, because the mean of its divisors is an integer number (61300840).

Almost surely, 2^631888957 is an apocalyptic number.

It is an amenable number.

631888957 is a deficient number, since it is larger than the sum of its proper divisors (103721123).

631888957 is a wasteful number, since it uses less digits than its factorization.

631888957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9760 (or 9753 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The square root of 631888957 is about 25137.4015562468. The cubic root of 631888957 is about 858.1178221456.

The spelling of 631888957 in words is "six hundred thirty-one million, eight hundred eighty-eight thousand, nine hundred fifty-seven".