23012409 has 24 divisors (see below), whose sum is σ = 36666048. Its totient is φ = 12791520.

The previous prime is 23012393. The next prime is 23012411. The reversal of 23012409 is 90421032.

It is not a de Polignac number, because 23012409 - 2⁴ = 23012393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (23012309) 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 23 ways as a sum of consecutive naturals, for example, 3324 + ... + 7554.

It is an arithmetic number, because the mean of its divisors is an integer number (1527752).

Almost surely, 2^23012409 is an apocalyptic number.

It is an amenable number.

23012409 is a deficient number, since it is larger than the sum of its proper divisors (13653639).

23012409 is a wasteful number, since it uses less digits than its factorization.

23012409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285 (or 4278 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23012409 is about 4797.1250765432. The cubic root of 23012409 is about 284.4378330587.

The spelling of 23012409 in words is "twenty-three million, twelve thousand, four hundred nine".