812965668731 has 2 divisors, whose sum is σ = 812965668732. Its totient is φ = 812965668730.

The previous prime is 812965668727. The next prime is 812965668769. The reversal of 812965668731 is 137866569218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812965668731 - 2² = 812965668727 is a prime.

It is a super-2 number, since 2×812965668731² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (812965698731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406482834365 + 406482834366.

It is an arithmetic number, because the mean of its divisors is an integer number (406482834366).

Almost surely, 2^812965668731 is an apocalyptic number.

812965668731 is a deficient number, since it is larger than the sum of its proper divisors (1).

812965668731 is an equidigital number, since it uses as much as digits as its factorization.

812965668731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 62.

The spelling of 812965668731 in words is "eight hundred twelve billion, nine hundred sixty-five million, six hundred sixty-eight thousand, seven hundred thirty-one".