812707171273 has 2 divisors, whose sum is σ = 812707171274. Its totient is φ = 812707171272.

The previous prime is 812707171249. The next prime is 812707171307. The reversal of 812707171273 is 372171707218.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447664031929 + 365043139344 = 669077^2 + 604188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812707171273 is a prime.

It is a super-2 number, since 2×812707171273² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (812707171373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406353585636 + 406353585637.

It is an arithmetic number, because the mean of its divisors is an integer number (406353585637).

Almost surely, 2^812707171273 is an apocalyptic number.

It is an amenable number.

812707171273 is a deficient number, since it is larger than the sum of its proper divisors (1).

812707171273 is an equidigital number, since it uses as much as digits as its factorization.

812707171273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230496, while the sum is 46.

The spelling of 812707171273 in words is "eight hundred twelve billion, seven hundred seven million, one hundred seventy-one thousand, two hundred seventy-three".