23128969 has 4 divisors (see below), whose sum is σ = 23666896. Its totient is φ = 22591044.

The previous prime is 23128951. The next prime is 23128981. The reversal of 23128969 is 96982132.

It is a happy number.

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 23128969 - 2¹⁵ = 23096201 is a prime.

It is a super-2 number, since 2×23128969² = 1069898414005922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23128069) 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, 268899 + ... + 268984.

It is an arithmetic number, because the mean of its divisors is an integer number (5916724).

Almost surely, 2^23128969 is an apocalyptic number.

It is an amenable number.

23128969 is a deficient number, since it is larger than the sum of its proper divisors (537927).

23128969 is an equidigital number, since it uses as much as digits as its factorization.

23128969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537926.

The product of its digits is 46656, while the sum is 40.

The square root of 23128969 is about 4809.2586746816. The cubic root of 23128969 is about 284.9172592478.

The spelling of 23128969 in words is "twenty-three million, one hundred twenty-eight thousand, nine hundred sixty-nine".