812315799 has 6 divisors (see below), whose sum is σ = 1173345056. Its totient is φ = 541543860.

The previous prime is 812315761. The next prime is 812315809. The reversal of 812315799 is 997513218.

It is not a de Polignac number, because 812315799 - 2⁷ = 812315671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812314799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45128647 + ... + 45128664.

Almost surely, 2^812315799 is an apocalyptic number.

812315799 is a deficient number, since it is larger than the sum of its proper divisors (361029257).

812315799 is a wasteful number, since it uses less digits than its factorization.

812315799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90257317 (or 90257314 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 812315799 is about 28501.1543450436. The cubic root of 812315799 is about 933.0572677427.

The spelling of 812315799 in words is "eight hundred twelve million, three hundred fifteen thousand, seven hundred ninety-nine".