812314691 has 2 divisors, whose sum is σ = 812314692. Its totient is φ = 812314690.

The previous prime is 812314681. The next prime is 812314693. The reversal of 812314691 is 196413218.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812314691 is a prime.

Together with 812314693, 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 (812314693) 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, 406157345 + 406157346.

It is an arithmetic number, because the mean of its divisors is an integer number (406157346).

Almost surely, 2^812314691 is an apocalyptic number.

812314691 is a deficient number, since it is larger than the sum of its proper divisors (1).

812314691 is an equidigital number, since it uses as much as digits as its factorization.

812314691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 812314691 is about 28501.1349072278. The cubic root of 812314691 is about 933.0568435120.

The spelling of 812314691 in words is "eight hundred twelve million, three hundred fourteen thousand, six hundred ninety-one".