79639623 has 24 divisors (see below), whose sum is σ = 131883648. Its totient is φ = 45364752.

The previous prime is 79639613. The next prime is 79639627. The reversal of 79639623 is 32693697.

79639623 is a `hidden beast` number, since 7 + 9 + 639 + 6 + 2 + 3 = 666.

It is not a de Polignac number, because 79639623 - 2⁵ = 79639591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79639627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20040 + ... + 23682.

It is an arithmetic number, because the mean of its divisors is an integer number (5495152).

Almost surely, 2^79639623 is an apocalyptic number.

79639623 is a deficient number, since it is larger than the sum of its proper divisors (52244025).

79639623 is a wasteful number, since it uses less digits than its factorization.

79639623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003 (or 4000 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 79639623 is about 8924.1034843843. The cubic root of 79639623 is about 430.2389567819.

The spelling of 79639623 in words is "seventy-nine million, six hundred thirty-nine thousand, six hundred twenty-three".