812954689597 has 2 divisors, whose sum is σ = 812954689598. Its totient is φ = 812954689596.

The previous prime is 812954689543. The next prime is 812954689609. The reversal of 812954689597 is 795986459218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509369117401 + 303585572196 = 713701^2 + 550986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812954689597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812954689697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406477344798 + 406477344799.

It is an arithmetic number, because the mean of its divisors is an integer number (406477344799).

Almost surely, 2^812954689597 is an apocalyptic number.

It is an amenable number.

812954689597 is a deficient number, since it is larger than the sum of its proper divisors (1).

812954689597 is an equidigital number, since it uses as much as digits as its factorization.

812954689597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 391910400, while the sum is 73.

The spelling of 812954689597 in words is "eight hundred twelve billion, nine hundred fifty-four million, six hundred eighty-nine thousand, five hundred ninety-seven".