79720574 has 16 divisors (see below), whose sum is σ = 121427856. Its totient is φ = 39249600.

The previous prime is 79720547. The next prime is 79720577. The reversal of 79720574 is 47502797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79720577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34784 + ... + 37004.

It is an arithmetic number, because the mean of its divisors is an integer number (7589241).

Almost surely, 2^79720574 is an apocalyptic number.

79720574 is a deficient number, since it is larger than the sum of its proper divisors (41707282).

79720574 is a wasteful number, since it uses less digits than its factorization.

79720574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 123480, while the sum is 41.

The square root of 79720574 is about 8928.6378580386. The cubic root of 79720574 is about 430.3846818977.

The spelling of 79720574 in words is "seventy-nine million, seven hundred twenty thousand, five hundred seventy-four".