79516591 has 8 divisors (see below), whose sum is σ = 99137664. Its totient is φ = 61960920.

The previous prime is 79516561. The next prime is 79516627. The reversal of 79516591 is 19561597.

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

It is not a de Polignac number, because 79516591 - 2⁵ = 79516559 is a prime.

It is a super-2 number, since 2×79516591² = 12645776488522562, 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 (79516561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516265 + ... + 516418.

It is an arithmetic number, because the mean of its divisors is an integer number (12392208).

Almost surely, 2^79516591 is an apocalyptic number.

79516591 is a deficient number, since it is larger than the sum of its proper divisors (19621073).

79516591 is a wasteful number, since it uses less digits than its factorization.

79516591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032701.

The product of its digits is 85050, while the sum is 43.

The square root of 79516591 is about 8917.2075786089. The cubic root of 79516591 is about 430.0172897321.

The spelling of 79516591 in words is "seventy-nine million, five hundred sixteen thousand, five hundred ninety-one".