811713812 has 36 divisors (see below), whose sum is σ = 1779532020. Its totient is φ = 321116544.

The previous prime is 811713809. The next prime is 811713817. The reversal of 811713812 is 218317118.

It can be written as a sum of positive squares in 2 ways, for example, as 507420676 + 304293136 = 22526^2 + 17444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811713817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156737 + ... + 161832.

It is an arithmetic number, because the mean of its divisors is an integer number (49431445).

Almost surely, 2^811713812 is an apocalyptic number.

It is an amenable number.

811713812 is an abundant number, since it is smaller than the sum of its proper divisors (967818208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811713812 is a wasteful number, since it uses less digits than its factorization.

811713812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318600 (or 318591 counting only the distinct ones).

The product of its digits is 2688, while the sum is 32.

The square root of 811713812 is about 28490.5916400485. The cubic root of 811713812 is about 932.8267222847.

The spelling of 811713812 in words is "eight hundred eleven million, seven hundred thirteen thousand, eight hundred twelve".