80791965 has 32 divisors (see below), whose sum is σ = 145670400. Its totient is φ = 42477120.

The previous prime is 80791927. The next prime is 80791987. The reversal of 80791965 is 56919708.

It is not a de Polignac number, because 80791965 - 2⁶ = 80791901 is a prime.

It is a super-2 number, since 2×80791965² = 13054683217122450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 80791965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5371 + ... + 13799.

It is an arithmetic number, because the mean of its divisors is an integer number (4552200).

Almost surely, 2^80791965 is an apocalyptic number.

It is an amenable number.

80791965 is a deficient number, since it is larger than the sum of its proper divisors (64878435).

80791965 is a wasteful number, since it uses less digits than its factorization.

80791965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8514 (or 8508 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 80791965 is about 8988.4350695769. The cubic root of 80791965 is about 432.3041357556.

The spelling of 80791965 in words is "eighty million, seven hundred ninety-one thousand, nine hundred sixty-five".