23979813 has 16 divisors (see below), whose sum is σ = 37563456. Its totient is φ = 13415040.

The previous prime is 23979803. The next prime is 23979817. The reversal of 23979813 is 31897932.

It is not a de Polignac number, because 23979813 - 2⁶ = 23979749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23979817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27520 + ... + 28377.

It is an arithmetic number, because the mean of its divisors is an integer number (2347716).

Almost surely, 2^23979813 is an apocalyptic number.

It is an amenable number.

23979813 is a deficient number, since it is larger than the sum of its proper divisors (13583643).

23979813 is a wasteful number, since it uses less digits than its factorization.

23979813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55924.

The product of its digits is 81648, while the sum is 42.

The square root of 23979813 is about 4896.9187250760. The cubic root of 23979813 is about 288.3690172311.

The spelling of 23979813 in words is "twenty-three million, nine hundred seventy-nine thousand, eight hundred thirteen".