23765009 has 4 divisors (see below), whose sum is σ = 23784816. Its totient is φ = 23745204.

The previous prime is 23764999. The next prime is 23765059. The reversal of 23765009 is 90056732.

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 23765009 - 2²⁴ = 6987793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23765059) 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, 7979 + ... + 10544.

It is an arithmetic number, because the mean of its divisors is an integer number (5946204).

Almost surely, 2^23765009 is an apocalyptic number.

It is an amenable number.

23765009 is a deficient number, since it is larger than the sum of its proper divisors (19807).

23765009 is a wasteful number, since it uses less digits than its factorization.

23765009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19806.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 23765009 is about 4874.9368201034. The cubic root of 23765009 is about 287.5053922114.

The spelling of 23765009 in words is "twenty-three million, seven hundred sixty-five thousand, nine".