814812813 has 6 divisors (see below), whose sum is σ = 1176951854. Its totient is φ = 543208536.

The previous prime is 814812809. The next prime is 814812851. The reversal of 814812813 is 318218418.

It can be written as a sum of positive squares in only one way, i.e., 769896009 + 44916804 = 27747^2 + 6702^2 .

It is not a de Polignac number, because 814812813 - 2² = 814812809 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 (814811813) 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, 45267370 + ... + 45267387.

Almost surely, 2^814812813 is an apocalyptic number.

It is an amenable number.

814812813 is a deficient number, since it is larger than the sum of its proper divisors (362139041).

814812813 is a wasteful number, since it uses less digits than its factorization.

814812813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90534763 (or 90534760 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 814812813 is about 28544.9262216598. The cubic root of 814812813 is about 934.0123453319.

The spelling of 814812813 in words is "eight hundred fourteen million, eight hundred twelve thousand, eight hundred thirteen".