812455673 has 2 divisors, whose sum is σ = 812455674. Its totient is φ = 812455672.

The previous prime is 812455669. The next prime is 812455691. The reversal of 812455673 is 376554218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 759994624 + 52461049 = 27568^2 + 7243^2 .

It is a cyclic number.

It is not a de Polignac number, because 812455673 - 2² = 812455669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 812455673.

It is not a weakly prime, because it can be changed into another prime (812455613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406227836 + 406227837.

It is an arithmetic number, because the mean of its divisors is an integer number (406227837).

Almost surely, 2^812455673 is an apocalyptic number.

It is an amenable number.

812455673 is a deficient number, since it is larger than the sum of its proper divisors (1).

812455673 is an equidigital number, since it uses as much as digits as its factorization.

812455673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 812455673 is about 28503.6080698567. The cubic root of 812455673 is about 933.1108195601.

The spelling of 812455673 in words is "eight hundred twelve million, four hundred fifty-five thousand, six hundred seventy-three".