975399631 has 2 divisors, whose sum is σ = 975399632. Its totient is φ = 975399630.

The previous prime is 975399629. The next prime is 975399641. The reversal of 975399631 is 136993579.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 975399631 - 2¹ = 975399629 is a prime.

It is a super-2 number, since 2×975399631² = 1902808880309872322, which contains 22 as substring.

Together with 975399629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975399641) 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 as a sum of consecutive naturals, namely, 487699815 + 487699816.

It is an arithmetic number, because the mean of its divisors is an integer number (487699816).

Almost surely, 2^975399631 is an apocalyptic number.

975399631 is a deficient number, since it is larger than the sum of its proper divisors (1).

975399631 is an equidigital number, since it uses as much as digits as its factorization.

975399631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 52.

The square root of 975399631 is about 31231.3885538251. The cubic root of 975399631 is about 991.7317006459.

The spelling of 975399631 in words is "nine hundred seventy-five million, three hundred ninety-nine thousand, six hundred thirty-one".