79531965 has 24 divisors (see below), whose sum is σ = 139201920. Its totient is φ = 42002784.

The previous prime is 79531951. The next prime is 79531973. The reversal of 79531965 is 56913597.

79531965 = T₂₇₈ + T₂₇₉ + ... + T₇₉₂.

It is not a de Polignac number, because 79531965 - 2⁹ = 79531453 is a prime.

It is a super-2 number, since 2×79531965² = 12650666913522450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 79531965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3945 + ... + 13214.

It is an arithmetic number, because the mean of its divisors is an integer number (5800080).

Almost surely, 2^79531965 is an apocalyptic number.

It is an amenable number.

79531965 is a deficient number, since it is larger than the sum of its proper divisors (59669955).

79531965 is a wasteful number, since it uses less digits than its factorization.

79531965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17273 (or 17270 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 79531965 is about 8918.0695781094. The cubic root of 79531965 is about 430.0450015999.

The spelling of 79531965 in words is "seventy-nine million, five hundred thirty-one thousand, nine hundred sixty-five".