79617889 has 12 divisors (see below), whose sum is σ = 88611348. Its totient is φ = 71111520.

The previous prime is 79617883. The next prime is 79617899. The reversal of 79617889 is 98871697.

It can be written as a sum of positive squares in 2 ways, for example, as 38440000 + 41177889 = 6200^2 + 6417^2 .

It is not a de Polignac number, because 79617889 - 2⁷ = 79617761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79617883) 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 11 ways as a sum of consecutive naturals, for example, 9307 + ... + 15679.

It is an arithmetic number, because the mean of its divisors is an integer number (7384279).

Almost surely, 2^79617889 is an apocalyptic number.

It is an amenable number.

79617889 is a deficient number, since it is larger than the sum of its proper divisors (8993459).

79617889 is a wasteful number, since it uses less digits than its factorization.

79617889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448 (or 6417 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 55.

The square root of 79617889 is about 8922.8856879375. The cubic root of 79617889 is about 430.1998151926.

The spelling of 79617889 in words is "seventy-nine million, six hundred seventeen thousand, eight hundred eighty-nine".