23902513 has 4 divisors (see below), whose sum is σ = 25160560. Its totient is φ = 22644468.

The previous prime is 23902507. The next prime is 23902531. The reversal of 23902513 is 31520932.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23902513 - 2⁹ = 23902001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23902553) 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, 628995 + ... + 629032.

It is an arithmetic number, because the mean of its divisors is an integer number (6290140).

Almost surely, 2^23902513 is an apocalyptic number.

It is an amenable number.

23902513 is a deficient number, since it is larger than the sum of its proper divisors (1258047).

23902513 is a wasteful number, since it uses less digits than its factorization.

23902513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258046.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 23902513 is about 4889.0196358779. The cubic root of 23902513 is about 288.0588268785.

The spelling of 23902513 in words is "twenty-three million, nine hundred two thousand, five hundred thirteen".