79515071 has 16 divisors (see below), whose sum is σ = 86788800. Its totient is φ = 72619008.

The previous prime is 79515047. The next prime is 79515077. The reversal of 79515071 is 17051597.

It is a cyclic number.

It is not a de Polignac number, because 79515071 - 2²² = 75320767 is a prime.

It is a super-2 number, since 2×79515071² = 12645293032270082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79515077) 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, 64085 + ... + 65313.

It is an arithmetic number, because the mean of its divisors is an integer number (5424300).

Almost surely, 2^79515071 is an apocalyptic number.

79515071 is a deficient number, since it is larger than the sum of its proper divisors (7273729).

79515071 is a wasteful number, since it uses less digits than its factorization.

79515071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378.

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 79515071 is about 8917.1223497270. The cubic root of 79515071 is about 430.0145497150.

The spelling of 79515071 in words is "seventy-nine million, five hundred fifteen thousand, seventy-one".