79789689 has 24 divisors (see below), whose sum is σ = 134409600. Its totient is φ = 45592344.

The previous prime is 79789681. The next prime is 79789709. The reversal of 79789689 is 98698797.

It is not a de Polignac number, because 79789689 - 2³ = 79789681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (79789681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9837 + ... + 16010.

It is an arithmetic number, because the mean of its divisors is an integer number (5600400).

Almost surely, 2^79789689 is an apocalyptic number.

It is an amenable number.

79789689 is a deficient number, since it is larger than the sum of its proper divisors (54619911).

79789689 is a wasteful number, since it uses less digits than its factorization.

79789689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25874 (or 25857 counting only the distinct ones).

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

The square root of 79789689 is about 8932.5074307274. The cubic root of 79789689 is about 430.5090222182.

The spelling of 79789689 in words is "seventy-nine million, seven hundred eighty-nine thousand, six hundred eighty-nine".