23904939 has 4 divisors (see below), whose sum is σ = 31873256. Its totient is φ = 15936624.

The previous prime is 23904929. The next prime is 23904943. The reversal of 23904939 is 93940932.

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

It is not a de Polignac number, because 23904939 - 2²⁰ = 22856363 is a prime.

It is a super-2 number, since 2×23904939² = 1142892217187442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23904897 and 23904906.

It is not an unprimeable number, because it can be changed into a prime (23904929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984154 + ... + 3984159.

It is an arithmetic number, because the mean of its divisors is an integer number (7968314).

Almost surely, 2^23904939 is an apocalyptic number.

23904939 is a deficient number, since it is larger than the sum of its proper divisors (7968317).

23904939 is an equidigital number, since it uses as much as digits as its factorization.

23904939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7968316.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 23904939 is about 4889.2677365839. The cubic root of 23904939 is about 288.0685721171.

The spelling of 23904939 in words is "twenty-three million, nine hundred four thousand, nine hundred thirty-nine".