79691289 has 4 divisors (see below), whose sum is σ = 106255056. Its totient is φ = 53127524.

The previous prime is 79691281. The next prime is 79691299. The reversal of 79691289 is 98219697.

It is a happy number.

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 79691289 - 2³ = 79691281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79691281) 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, 13281879 + ... + 13281884.

It is an arithmetic number, because the mean of its divisors is an integer number (26563764).

Almost surely, 2^79691289 is an apocalyptic number.

It is an amenable number.

79691289 is a deficient number, since it is larger than the sum of its proper divisors (26563767).

79691289 is a wasteful number, since it uses less digits than its factorization.

79691289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26563766.

The product of its digits is 489888, while the sum is 51.

The square root of 79691289 is about 8926.9977596054. The cubic root of 79691289 is about 430.3319754741.

The spelling of 79691289 in words is "seventy-nine million, six hundred ninety-one thousand, two hundred eighty-nine".