79687089 has 6 divisors (see below), whose sum is σ = 115103586. Its totient is φ = 53124720.

The previous prime is 79687033. The next prime is 79687103. The reversal of 79687089 is 98078697.

It can be written as a sum of positive squares in only one way, i.e., 69555600 + 10131489 = 8340^2 + 3183^2 .

It is not a de Polignac number, because 79687089 - 2⁷ = 79686961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79687189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4427052 + ... + 4427069.

It is an arithmetic number, because the mean of its divisors is an integer number (19183931).

Almost surely, 2^79687089 is an apocalyptic number.

It is an amenable number.

79687089 is a deficient number, since it is larger than the sum of its proper divisors (35416497).

79687089 is a wasteful number, since it uses less digits than its factorization.

79687089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8854127 (or 8854124 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 79687089 is about 8926.7625150443. The cubic root of 79687089 is about 430.3244153586.

The spelling of 79687089 in words is "seventy-nine million, six hundred eighty-seven thousand, eighty-nine".