23133809 has 4 divisors (see below), whose sum is σ = 23235060. Its totient is φ = 23032560.

The previous prime is 23133757. The next prime is 23133839. The reversal of 23133809 is 90833132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9591409 + 13542400 = 3097^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 23133809 - 2²⁴ = 6356593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23133839) 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, 50282 + ... + 50739.

It is an arithmetic number, because the mean of its divisors is an integer number (5808765).

Almost surely, 2^23133809 is an apocalyptic number.

It is an amenable number.

23133809 is a deficient number, since it is larger than the sum of its proper divisors (101251).

23133809 is a wasteful number, since it uses less digits than its factorization.

23133809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101250.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 23133809 is about 4809.7618444160. The cubic root of 23133809 is about 284.9371319214.

The spelling of 23133809 in words is "twenty-three million, one hundred thirty-three thousand, eight hundred nine".