79421518 has 32 divisors (see below), whose sum is σ = 139540320. Its totient is φ = 33500160.

The previous prime is 79421513. The next prime is 79421521. The reversal of 79421518 is 81512497.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79421513) 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, 25848 + ... + 28756.

It is an arithmetic number, because the mean of its divisors is an integer number (4360635).

Almost surely, 2^79421518 is an apocalyptic number.

79421518 is a deficient number, since it is larger than the sum of its proper divisors (60118802).

79421518 is a wasteful number, since it uses less digits than its factorization.

79421518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012.

The product of its digits is 20160, while the sum is 37.

The square root of 79421518 is about 8911.8751113332. The cubic root of 79421518 is about 429.8458398167.

The spelling of 79421518 in words is "seventy-nine million, four hundred twenty-one thousand, five hundred eighteen".