79539745 has 16 divisors (see below), whose sum is σ = 98599680. Its totient is φ = 61561984.

The previous prime is 79539689. The next prime is 79539749. The reversal of 79539745 is 54793597.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79539745 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79539749) 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, 19014 + ... + 22816.

It is an arithmetic number, because the mean of its divisors is an integer number (6162480).

Almost surely, 2^79539745 is an apocalyptic number.

It is an amenable number.

79539745 is a deficient number, since it is larger than the sum of its proper divisors (19059935).

79539745 is a wasteful number, since it uses less digits than its factorization.

79539745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its digits is 1190700, while the sum is 49.

The square root of 79539745 is about 8918.5057604960. The cubic root of 79539745 is about 430.0590238069.

It can be divided in two parts, 795 and 39745, that multiplied together give a triangular number (31597275 = T₇₉₄₉).

The spelling of 79539745 in words is "seventy-nine million, five hundred thirty-nine thousand, seven hundred forty-five".