79731265 has 8 divisors (see below), whose sum is σ = 98011368. Its totient is φ = 62229120.

The previous prime is 79731259. The next prime is 79731269. The reversal of 79731265 is 56213797.

It can be written as a sum of positive squares in 4 ways, for example, as 1656369 + 78074896 = 1287^2 + 8836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79731265 - 2⁷ = 79731137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79731269) 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, 194262 + ... + 194671.

It is an arithmetic number, because the mean of its divisors is an integer number (12251421).

Almost surely, 2^79731265 is an apocalyptic number.

It is an amenable number.

79731265 is a deficient number, since it is larger than the sum of its proper divisors (18280103).

79731265 is a wasteful number, since it uses less digits than its factorization.

79731265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388979.

The product of its digits is 79380, while the sum is 40.

The square root of 79731265 is about 8929.2365295136. The cubic root of 79731265 is about 430.4039200807.

The spelling of 79731265 in words is "seventy-nine million, seven hundred thirty-one thousand, two hundred sixty-five".