23128163 has 4 divisors (see below), whose sum is σ = 23388120. Its totient is φ = 22868208.

The previous prime is 23128159. The next prime is 23128169. The reversal of 23128163 is 36182132.

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

It is a cyclic number.

It is not a de Polignac number, because 23128163 - 2² = 23128159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23128169) 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, 129845 + ... + 130022.

It is an arithmetic number, because the mean of its divisors is an integer number (5847030).

Almost surely, 2^23128163 is an apocalyptic number.

23128163 is a deficient number, since it is larger than the sum of its proper divisors (259957).

23128163 is an equidigital number, since it uses as much as digits as its factorization.

23128163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259956.

The product of its digits is 1728, while the sum is 26.

The square root of 23128163 is about 4809.1748772529. The cubic root of 23128163 is about 284.9139496035.

The spelling of 23128163 in words is "twenty-three million, one hundred twenty-eight thousand, one hundred sixty-three".