79623681 has 16 divisors (see below), whose sum is σ = 109334400. Its totient is φ = 51511680.

The previous prime is 79623637. The next prime is 79623683. The reversal of 79623681 is 18632697.

It is a happy number.

It is not a de Polignac number, because 79623681 - 2²⁵ = 46069249 is a prime.

It is a super-2 number, since 2×79623681² = 12679861151979522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79623683) 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, 22851 + ... + 26103.

It is an arithmetic number, because the mean of its divisors is an integer number (6833400).

Almost surely, 2^79623681 is an apocalyptic number.

It is an amenable number.

79623681 is a deficient number, since it is larger than the sum of its proper divisors (29710719).

79623681 is a wasteful number, since it uses less digits than its factorization.

79623681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496.

The product of its digits is 108864, while the sum is 42.

The square root of 79623681 is about 8923.2102407149. The cubic root of 79623681 is about 430.2102469224.

The spelling of 79623681 in words is "seventy-nine million, six hundred twenty-three thousand, six hundred eighty-one".