79768989 has 16 divisors (see below), whose sum is σ = 118566400. Its totient is φ = 53003808.

The previous prime is 79768987. The next prime is 79769021. The reversal of 79768989 is 98986797.

It is not a de Polignac number, because 79768989 - 2¹ = 79768987 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 (79768987) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3732 + ... + 13170.

It is an arithmetic number, because the mean of its divisors is an integer number (7410400).

Almost surely, 2^79768989 is an apocalyptic number.

It is an amenable number.

79768989 is a deficient number, since it is larger than the sum of its proper divisors (38797411).

79768989 is a wasteful number, since it uses less digits than its factorization.

79768989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761 (or 9755 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The square root of 79768989 is about 8931.3486663549. The cubic root of 79768989 is about 430.4717897235.

The spelling of 79768989 in words is "seventy-nine million, seven hundred sixty-eight thousand, nine hundred eighty-nine".