800979813 has 16 divisors (see below), whose sum is σ = 1215580800. Its totient is φ = 520961760.

The previous prime is 800979763. The next prime is 800979847. The reversal of 800979813 is 318979008.

It is not a de Polignac number, because 800979813 - 2¹² = 800975717 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800978813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360673 + ... + 362886.

It is an arithmetic number, because the mean of its divisors is an integer number (75973800).

Almost surely, 2^800979813 is an apocalyptic number.

It is an amenable number.

800979813 is a deficient number, since it is larger than the sum of its proper divisors (414600987).

800979813 is a wasteful number, since it uses less digits than its factorization.

800979813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723609 (or 723603 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 800979813 is about 28301.5867576360. The cubic root of 800979813 is about 928.6966028594.

The spelling of 800979813 in words is "eight hundred million, nine hundred seventy-nine thousand, eight hundred thirteen".