79588981 has 4 divisors (see below), whose sum is σ = 79662892. Its totient is φ = 79515072.

The previous prime is 79588979. The next prime is 79588991. The reversal of 79588981 is 18988597.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64144081 + 15444900 = 8009^2 + 3930^2 .

It is a cyclic number.

It is not a de Polignac number, because 79588981 - 2¹ = 79588979 is a prime.

It is a super-2 number, since 2×79588981² = 12668811793236722, 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 (79588931) 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 3 ways as a sum of consecutive naturals, for example, 35316 + ... + 37501.

It is an arithmetic number, because the mean of its divisors is an integer number (19915723).

Almost surely, 2^79588981 is an apocalyptic number.

It is an amenable number.

79588981 is a deficient number, since it is larger than the sum of its proper divisors (73911).

79588981 is a wasteful number, since it uses less digits than its factorization.

79588981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73910.

The product of its digits is 1451520, while the sum is 55.

The square root of 79588981 is about 8921.2656613286. The cubic root of 79588981 is about 430.1477426335.

The spelling of 79588981 in words is "seventy-nine million, five hundred eighty-eight thousand, nine hundred eighty-one".