23591409 has 4 divisors (see below), whose sum is σ = 31455216. Its totient is φ = 15727604.

The previous prime is 23591377. The next prime is 23591417. The reversal of 23591409 is 90419532.

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 23591409 - 2⁵ = 23591377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23591409.

It is not an unprimeable number, because it can be changed into a prime (23591609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931899 + ... + 3931904.

It is an arithmetic number, because the mean of its divisors is an integer number (7863804).

Almost surely, 2^23591409 is an apocalyptic number.

It is an amenable number.

23591409 is a deficient number, since it is larger than the sum of its proper divisors (7863807).

23591409 is an equidigital number, since it uses as much as digits as its factorization.

23591409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7863806.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 23591409 is about 4857.0988254307. The cubic root of 23591409 is about 286.8036186857.

The spelling of 23591409 in words is "twenty-three million, five hundred ninety-one thousand, four hundred nine".