23819889 has 4 divisors (see below), whose sum is σ = 31759856. Its totient is φ = 15879924.

The previous prime is 23819869. The next prime is 23819909. The reversal of 23819889 is 98891832.

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 an interprime number because it is at equal distance from previous prime (23819869) and next prime (23819909).

It is not a de Polignac number, because 23819889 - 2⁵ = 23819857 is a prime.

It is a super-2 number, since 2×23819889² = 1134774223944642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23819819) 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, 3969979 + ... + 3969984.

It is an arithmetic number, because the mean of its divisors is an integer number (7939964).

Almost surely, 2^23819889 is an apocalyptic number.

It is an amenable number.

23819889 is a deficient number, since it is larger than the sum of its proper divisors (7939967).

23819889 is an equidigital number, since it uses as much as digits as its factorization.

23819889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7939966.

The product of its digits is 248832, while the sum is 48.

The square root of 23819889 is about 4880.5623651379. The cubic root of 23819889 is about 287.7265319831.

The spelling of 23819889 in words is "twenty-three million, eight hundred nineteen thousand, eight hundred eighty-nine".