79989623 has 4 divisors (see below), whose sum is σ = 91416720. Its totient is φ = 68562528.

The previous prime is 79989619. The next prime is 79989631. The reversal of 79989623 is 32698997.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79989623 - 2² = 79989619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79989643) 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, 5713538 + ... + 5713551.

It is an arithmetic number, because the mean of its divisors is an integer number (22854180).

Almost surely, 2^79989623 is an apocalyptic number.

79989623 is a deficient number, since it is larger than the sum of its proper divisors (11427097).

79989623 is a wasteful number, since it uses less digits than its factorization.

79989623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11427096.

The product of its digits is 1469664, while the sum is 53.

The square root of 79989623 is about 8943.6917992516. The cubic root of 79989623 is about 430.8683067268.

The spelling of 79989623 in words is "seventy-nine million, nine hundred eighty-nine thousand, six hundred twenty-three".