6476979931 has 2 divisors, whose sum is σ = 6476979932. Its totient is φ = 6476979930.

The previous prime is 6476979911. The next prime is 6476979959. The reversal of 6476979931 is 1399796746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6476979931 is a prime.

It is a super-2 number, since 2×6476979931² = 83902538053153529522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6476979931.

It is not a weakly prime, because it can be changed into another prime (6476979911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3238489965 + 3238489966.

It is an arithmetic number, because the mean of its divisors is an integer number (3238489966).

Almost surely, 2^6476979931 is an apocalyptic number.

6476979931 is a deficient number, since it is larger than the sum of its proper divisors (1).

6476979931 is an equidigital number, since it uses as much as digits as its factorization.

6476979931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15431472, while the sum is 61.

The square root of 6476979931 is about 80479.6864494389. The cubic root of 6476979931 is about 1864.0498271899.

The spelling of 6476979931 in words is "six billion, four hundred seventy-six million, nine hundred seventy-nine thousand, nine hundred thirty-one".