812808697 has 2 divisors, whose sum is σ = 812808698. Its totient is φ = 812808696.

The previous prime is 812808683. The next prime is 812808739. The reversal of 812808697 is 796808218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 750540816 + 62267881 = 27396^2 + 7891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812808697 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812808697.

It is not a weakly prime, because it can be changed into another prime (812808397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406404348 + 406404349.

It is an arithmetic number, because the mean of its divisors is an integer number (406404349).

Almost surely, 2^812808697 is an apocalyptic number.

It is an amenable number.

812808697 is a deficient number, since it is larger than the sum of its proper divisors (1).

812808697 is an equidigital number, since it uses as much as digits as its factorization.

812808697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 812808697 is about 28509.8000168363. The cubic root of 812808697 is about 933.2459501382.

The spelling of 812808697 in words is "eight hundred twelve million, eight hundred eight thousand, six hundred ninety-seven".