79677889 has 4 divisors (see below), whose sum is σ = 79934400. Its totient is φ = 79421380.

The previous prime is 79677881. The next prime is 79677893. The reversal of 79677889 is 98877697.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79677889 - 2³ = 79677881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79677881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127789 + ... + 128410.

It is an arithmetic number, because the mean of its divisors is an integer number (19983600).

Almost surely, 2^79677889 is an apocalyptic number.

It is an amenable number.

79677889 is a deficient number, since it is larger than the sum of its proper divisors (256511).

79677889 is a wasteful number, since it uses less digits than its factorization.

79677889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256510.

The product of its digits is 10668672, while the sum is 61.

The square root of 79677889 is about 8926.2471957705. The cubic root of 79677889 is about 430.3078541772.

The spelling of 79677889 in words is "seventy-nine million, six hundred seventy-seven thousand, eight hundred eighty-nine".