79475865 has 32 divisors (see below), whose sum is σ = 145981440. Its totient is φ = 36168384.

The previous prime is 79475861. The next prime is 79475881. The reversal of 79475865 is 56857497.

It is not a de Polignac number, because 79475865 - 2² = 79475861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79475861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23512 + ... + 26678.

It is an arithmetic number, because the mean of its divisors is an integer number (4561920).

Almost surely, 2^79475865 is an apocalyptic number.

It is an amenable number.

79475865 is a deficient number, since it is larger than the sum of its proper divisors (66505575).

79475865 is a wasteful number, since it uses less digits than its factorization.

79475865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421.

The product of its digits is 2116800, while the sum is 51.

The square root of 79475865 is about 8914.9237237343. The cubic root of 79475865 is about 429.9438632323.

The spelling of 79475865 in words is "seventy-nine million, four hundred seventy-five thousand, eight hundred sixty-five".