23859409 has 12 divisors (see below), whose sum is σ = 27878464. Its totient is φ = 20002824.

The previous prime is 23859403. The next prime is 23859443. The reversal of 23859409 is 90495832.

It is a happy number.

It is not a de Polignac number, because 23859409 - 2¹⁵ = 23826641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23859403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14692 + ... + 16234.

Almost surely, 2^23859409 is an apocalyptic number.

It is an amenable number.

23859409 is a deficient number, since it is larger than the sum of its proper divisors (4019055).

23859409 is an equidigital number, since it uses as much as digits as its factorization.

23859409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 23859409 is about 4884.6094009654. The cubic root of 23859409 is about 287.8855681252.

The spelling of 23859409 in words is "twenty-three million, eight hundred fifty-nine thousand, four hundred nine".