79813512 has 40 divisors (see below), whose sum is σ = 223553550. Its totient is φ = 26604288.

The previous prime is 79813507. The next prime is 79813529. The reversal of 79813512 is 21531897.

It can be written as a sum of positive squares in only one way, i.e., 59074596 + 20738916 = 7686^2 + 4554^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60937 + ... + 62232.

Almost surely, 2^79813512 is an apocalyptic number.

79813512 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

79813512 is an abundant number, since it is smaller than the sum of its proper divisors (143740038).

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

79813512 is a wasteful number, since it uses less digits than its factorization.

79813512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123187 (or 123174 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 79813512 is about 8933.8408313558. The cubic root of 79813512 is about 430.5518639939.

The spelling of 79813512 in words is "seventy-nine million, eight hundred thirteen thousand, five hundred twelve".