812944931 has 2 divisors, whose sum is σ = 812944932. Its totient is φ = 812944930.

The previous prime is 812944919. The next prime is 812944933. The reversal of 812944931 is 139449218.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812944931 is a prime.

It is a super-2 number, since 2×812944931² = 1321758921677189522, which contains 22 as substring.

Together with 812944933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (812944933) 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 as a sum of consecutive naturals, namely, 406472465 + 406472466.

It is an arithmetic number, because the mean of its divisors is an integer number (406472466).

Almost surely, 2^812944931 is an apocalyptic number.

812944931 is a deficient number, since it is larger than the sum of its proper divisors (1).

812944931 is an equidigital number, since it uses as much as digits as its factorization.

812944931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 812944931 is about 28512.1891653377. The cubic root of 812944931 is about 933.2980873453.

The spelling of 812944931 in words is "eight hundred twelve million, nine hundred forty-four thousand, nine hundred thirty-one".