812923897 has 2 divisors, whose sum is σ = 812923898. Its totient is φ = 812923896.

The previous prime is 812923877. The next prime is 812923927. The reversal of 812923897 is 798329218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571401216 + 241522681 = 23904^2 + 15541^2 .

It is a cyclic number.

It is not a de Polignac number, because 812923897 - 2¹⁵ = 812891129 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 812923897.

It is not a weakly prime, because it can be changed into another prime (812923807) 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, 406461948 + 406461949.

It is an arithmetic number, because the mean of its divisors is an integer number (406461949).

Almost surely, 2^812923897 is an apocalyptic number.

It is an amenable number.

812923897 is a deficient number, since it is larger than the sum of its proper divisors (1).

812923897 is an equidigital number, since it uses as much as digits as its factorization.

812923897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 812923897 is about 28511.8203031655. The cubic root of 812923897 is about 933.2900379435.

The spelling of 812923897 in words is "eight hundred twelve million, nine hundred twenty-three thousand, eight hundred ninety-seven".