812461973 has 2 divisors, whose sum is σ = 812461974. Its totient is φ = 812461972.

The previous prime is 812461961. The next prime is 812461987. The reversal of 812461973 is 379164218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 812364004 + 97969 = 28502^2 + 313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812461973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812461973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812461933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406230986 + 406230987.

It is an arithmetic number, because the mean of its divisors is an integer number (406230987).

Almost surely, 2^812461973 is an apocalyptic number.

It is an amenable number.

812461973 is a deficient number, since it is larger than the sum of its proper divisors (1).

812461973 is an equidigital number, since it uses as much as digits as its factorization.

812461973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 812461973 is about 28503.7185819675. The cubic root of 812461973 is about 933.1132314180.

The spelling of 812461973 in words is "eight hundred twelve million, four hundred sixty-one thousand, nine hundred seventy-three".