23555409 has 4 divisors (see below), whose sum is σ = 31407216. Its totient is φ = 15703604.

The previous prime is 23555393. The next prime is 23555417. The reversal of 23555409 is 90455532.

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 23555409 - 2⁴ = 23555393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23555409.

It is not an unprimeable number, because it can be changed into a prime (23555419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3925899 + ... + 3925904.

It is an arithmetic number, because the mean of its divisors is an integer number (7851804).

Almost surely, 2^23555409 is an apocalyptic number.

It is an amenable number.

23555409 is a deficient number, since it is larger than the sum of its proper divisors (7851807).

23555409 is an equidigital number, since it uses as much as digits as its factorization.

23555409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851806.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 23555409 is about 4853.3914946149. The cubic root of 23555409 is about 286.6576589622.

The spelling of 23555409 in words is "twenty-three million, five hundred fifty-five thousand, four hundred nine".