812593697 has 2 divisors, whose sum is σ = 812593698. Its totient is φ = 812593696.

The previous prime is 812593687. The next prime is 812593699. The reversal of 812593697 is 796395218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 807923776 + 4669921 = 28424^2 + 2161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812593697 is a prime.

Together with 812593699, 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 (812593699) 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, 406296848 + 406296849.

It is an arithmetic number, because the mean of its divisors is an integer number (406296849).

Almost surely, 2^812593697 is an apocalyptic number.

It is an amenable number.

812593697 is a deficient number, since it is larger than the sum of its proper divisors (1).

812593697 is an equidigital number, since it uses as much as digits as its factorization.

812593697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 812593697 is about 28506.0291342025. The cubic root of 812593697 is about 933.1636570664.

The spelling of 812593697 in words is "eight hundred twelve million, five hundred ninety-three thousand, six hundred ninety-seven".