631957 has 4 divisors (see below), whose sum is σ = 638316. Its totient is φ = 625600.

The previous prime is 631937. The next prime is 631979. The reversal of 631957 is 759136.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 617796 + 14161 = 786^2 + 119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631957 is a prime.

It is a super-3 number, since 3×631957³ = 757153337428873479, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631927) 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, 3028 + ... + 3229.

It is an arithmetic number, because the mean of its divisors is an integer number (159579).

2⁶³¹⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

631957 is a deficient number, since it is larger than the sum of its proper divisors (6359).

631957 is a wasteful number, since it uses less digits than its factorization.

631957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358.

The product of its digits is 5670, while the sum is 31.

The square root of 631957 is about 794.9572315540. The cubic root of 631957 is about 85.8148622291.

The spelling of 631957 in words is "six hundred thirty-one thousand, nine hundred fifty-seven".