79971589 has 8 divisors (see below), whose sum is σ = 87084000. Its totient is φ = 73149552.

The previous prime is 79971557. The next prime is 79971601. The reversal of 79971589 is 98517997.

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

It is a cyclic number.

It is not a de Polignac number, because 79971589 - 2⁵ = 79971557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79971539) 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, 72019 + ... + 73120.

It is an arithmetic number, because the mean of its divisors is an integer number (10885500).

Almost surely, 2^79971589 is an apocalyptic number.

It is an amenable number.

79971589 is a deficient number, since it is larger than the sum of its proper divisors (7112411).

79971589 is a wasteful number, since it uses less digits than its factorization.

79971589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145187.

The product of its digits is 1428840, while the sum is 55.

The square root of 79971589 is about 8942.6835457820. The cubic root of 79971589 is about 430.8359239302.

The spelling of 79971589 in words is "seventy-nine million, nine hundred seventy-one thousand, five hundred eighty-nine".