812877713 has 4 divisors (see below), whose sum is σ = 813824880. Its totient is φ = 811930548.

The previous prime is 812877671. The next prime is 812877721. The reversal of 812877713 is 317778218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 317778218 = 2 ⋅158889109.

It is a cyclic number.

It is not a de Polignac number, because 812877713 - 2⁶ = 812877649 is a prime.

It is a super-2 number, since 2×812877713² = 1321540352584220738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812877733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472295 + ... + 474012.

It is an arithmetic number, because the mean of its divisors is an integer number (203456220).

Almost surely, 2^812877713 is an apocalyptic number.

It is an amenable number.

812877713 is a deficient number, since it is larger than the sum of its proper divisors (947167).

812877713 is an equidigital number, since it uses as much as digits as its factorization.

812877713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947166.

The product of its digits is 131712, while the sum is 44.

The square root of 812877713 is about 28511.0103819560. The cubic root of 812877713 is about 933.2723635201.

The spelling of 812877713 in words is "eight hundred twelve million, eight hundred seventy-seven thousand, seven hundred thirteen".