23904513 has 6 divisors (see below), whose sum is σ = 34528754. Its totient is φ = 15936336.

The previous prime is 23904511. The next prime is 23904523. The reversal of 23904513 is 31540932.

It can be written as a sum of positive squares in only one way, i.e., 19607184 + 4297329 = 4428^2 + 2073^2 .

It is not a de Polignac number, because 23904513 - 2¹ = 23904511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23904511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1328020 + ... + 1328037.

Almost surely, 2^23904513 is an apocalyptic number.

It is an amenable number.

23904513 is a deficient number, since it is larger than the sum of its proper divisors (10624241).

23904513 is a wasteful number, since it uses less digits than its factorization.

23904513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656063 (or 2656060 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 23904513 is about 4889.2241715839. The cubic root of 23904513 is about 288.0668609234.

It can be divided in two parts, 2390 and 4513, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 23904513 in words is "twenty-three million, nine hundred four thousand, five hundred thirteen".