957121631 has 2 divisors, whose sum is σ = 957121632. Its totient is φ = 957121630.

The previous prime is 957121549. The next prime is 957121651. The reversal of 957121631 is 136121759.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-957121631 is a prime.

It is a super-2 number, since 2×957121631² = 1832163633056200322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 957121591 and 957121600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (957121651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478560815 + 478560816.

It is an arithmetic number, because the mean of its divisors is an integer number (478560816).

Almost surely, 2^957121631 is an apocalyptic number.

957121631 is a deficient number, since it is larger than the sum of its proper divisors (1).

957121631 is an equidigital number, since it uses as much as digits as its factorization.

957121631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 957121631 is about 30937.3824199786. The cubic root of 957121631 is about 985.4979165555.

The spelling of 957121631 in words is "nine hundred fifty-seven million, one hundred twenty-one thousand, six hundred thirty-one".