631253957 has 4 divisors (see below), whose sum is σ = 631310700. Its totient is φ = 631197216.

The previous prime is 631253879. The next prime is 631253983. The reversal of 631253957 is 759352136.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 333829441 + 297424516 = 18271^2 + 17246^2 .

It is a cyclic number.

It is not a de Polignac number, because 631253957 - 2¹⁶ = 631188421 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 (631253057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5582 + ... + 35967.

It is an arithmetic number, because the mean of its divisors is an integer number (157827675).

Almost surely, 2^631253957 is an apocalyptic number.

It is an amenable number.

631253957 is a deficient number, since it is larger than the sum of its proper divisors (56743).

631253957 is a wasteful number, since it uses less digits than its factorization.

631253957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56742.

The product of its digits is 170100, while the sum is 41.

The square root of 631253957 is about 25124.7677999221. The cubic root of 631253957 is about 857.8302782440.

The spelling of 631253957 in words is "six hundred thirty-one million, two hundred fifty-three thousand, nine hundred fifty-seven".