23913009 has 16 divisors (see below), whose sum is σ = 35619840. Its totient is φ = 15855120.

The previous prime is 23912981. The next prime is 23913011. The reversal of 23913009 is 90031932.

It is not a de Polignac number, because 23913009 - 2⁸ = 23912753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23913049) 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, 2839 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (2226240).

Almost surely, 2^23913009 is an apocalyptic number.

It is an amenable number.

23913009 is a deficient number, since it is larger than the sum of its proper divisors (11706831).

23913009 is a wasteful number, since it uses less digits than its factorization.

23913009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837 (or 4831 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 23913009 is about 4890.0929439020. The cubic root of 23913009 is about 288.1009845518.

The spelling of 23913009 in words is "twenty-three million, nine hundred thirteen thousand, nine".