23208979 has 4 divisors (see below), whose sum is σ = 23241376. Its totient is φ = 23176584.

The previous prime is 23208973. The next prime is 23209003. The reversal of 23208979 is 97980232.

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 23208979 - 2⁵ = 23208947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23208973) 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, 15099 + ... + 16564.

It is an arithmetic number, because the mean of its divisors is an integer number (5810344).

Almost surely, 2^23208979 is an apocalyptic number.

23208979 is a deficient number, since it is larger than the sum of its proper divisors (32397).

23208979 is an equidigital number, since it uses as much as digits as its factorization.

23208979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32396.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 23208979 is about 4817.5698230539. The cubic root of 23208979 is about 285.2454190546.

The spelling of 23208979 in words is "twenty-three million, two hundred eight thousand, nine hundred seventy-nine".