812359681 has 12 divisors (see below), whose sum is σ = 975475200. Its totient is φ = 673845480.

The previous prime is 812359663. The next prime is 812359697. The reversal of 812359681 is 186953218.

It is not a de Polignac number, because 812359681 - 2⁷ = 812359553 is a prime.

It is a super-2 number, since 2×812359681² = 1319856502628843522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812359621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265881 + ... + 268918.

It is an arithmetic number, because the mean of its divisors is an integer number (81289600).

Almost surely, 2^812359681 is an apocalyptic number.

It is an amenable number.

812359681 is a deficient number, since it is larger than the sum of its proper divisors (163115519).

812359681 is a wasteful number, since it uses less digits than its factorization.

812359681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534844 (or 534837 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 812359681 is about 28501.9241631157. The cubic root of 812359681 is about 933.0740689596.

The spelling of 812359681 in words is "eight hundred twelve million, three hundred fifty-nine thousand, six hundred eighty-one".