23235809 has 4 divisors (see below), whose sum is σ = 23275200. Its totient is φ = 23196420.

The previous prime is 23235791. The next prime is 23235829. The reversal of 23235809 is 90853232.

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 a de Polignac number, because none of the positive numbers 2^k-23235809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23235829) 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 3 ways as a sum of consecutive naturals, for example, 18797 + ... + 19994.

It is an arithmetic number, because the mean of its divisors is an integer number (5818800).

Almost surely, 2^23235809 is an apocalyptic number.

It is an amenable number.

23235809 is a deficient number, since it is larger than the sum of its proper divisors (39391).

23235809 is an equidigital number, since it uses as much as digits as its factorization.

23235809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39390.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 23235809 is about 4820.3536177339. The cubic root of 23235809 is about 285.3552930166.

The spelling of 23235809 in words is "twenty-three million, two hundred thirty-five thousand, eight hundred nine".