23128967 has 4 divisors (see below), whose sum is σ = 23305656. Its totient is φ = 22952280.

The previous prime is 23128951. The next prime is 23128981. The reversal of 23128967 is 76982132.

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 23128967 - 2⁴ = 23128951 is a prime.

It is a super-2 number, since 2×23128967² = 1069898228974178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23128967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128907) 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, 88148 + ... + 88409.

It is an arithmetic number, because the mean of its divisors is an integer number (5826414).

Almost surely, 2^23128967 is an apocalyptic number.

23128967 is a deficient number, since it is larger than the sum of its proper divisors (176689).

23128967 is a wasteful number, since it uses less digits than its factorization.

23128967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176688.

The product of its digits is 36288, while the sum is 38.

The square root of 23128967 is about 4809.2584667493. The cubic root of 23128967 is about 284.9172510354.

The spelling of 23128967 in words is "twenty-three million, one hundred twenty-eight thousand, nine hundred sixty-seven".