631966357 has 4 divisors (see below), whose sum is σ = 689417856. Its totient is φ = 574514860.

The previous prime is 631966343. The next prime is 631966397. The reversal of 631966357 is 753669136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631966357 - 2⁷ = 631966229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631966397) 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, 28725733 + ... + 28725754.

It is an arithmetic number, because the mean of its divisors is an integer number (172354464).

Almost surely, 2^631966357 is an apocalyptic number.

It is an amenable number.

631966357 is a deficient number, since it is larger than the sum of its proper divisors (57451499).

631966357 is a wasteful number, since it uses less digits than its factorization.

631966357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57451498.

The product of its digits is 612360, while the sum is 46.

The square root of 631966357 is about 25138.9410477053. The cubic root of 631966357 is about 858.1528576303.

The spelling of 631966357 in words is "six hundred thirty-one million, nine hundred sixty-six thousand, three hundred fifty-seven".