23009409 has 12 divisors (see below), whose sum is σ = 34308352. Its totient is φ = 14844600.

The previous prime is 23009377. The next prime is 23009411. The reversal of 23009409 is 90490032.

It is not a de Polignac number, because 23009409 - 2⁵ = 23009377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23009419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40957 + ... + 41514.

Almost surely, 2^23009409 is an apocalyptic number.

It is an amenable number.

23009409 is a deficient number, since it is larger than the sum of its proper divisors (11298943).

23009409 is a wasteful number, since it uses less digits than its factorization.

23009409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82508 (or 82505 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 23009409 is about 4796.8123790701. The cubic root of 23009409 is about 284.4254723279.

The spelling of 23009409 in words is "twenty-three million, nine thousand, four hundred nine".