23163509 has 4 divisors (see below), whose sum is σ = 23205216. Its totient is φ = 23121804.

The previous prime is 23163499. The next prime is 23163521. The reversal of 23163509 is 90536132.

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 23163509 - 2⁴ = 23163493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23163529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20009 + ... + 21134.

It is an arithmetic number, because the mean of its divisors is an integer number (5801304).

Almost surely, 2^23163509 is an apocalyptic number.

It is an amenable number.

23163509 is a deficient number, since it is larger than the sum of its proper divisors (41707).

23163509 is an equidigital number, since it uses as much as digits as its factorization.

23163509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41706.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 23163509 is about 4812.8483250566. The cubic root of 23163509 is about 285.0590172229.

The spelling of 23163509 in words is "twenty-three million, one hundred sixty-three thousand, five hundred nine".