23889 has 4 divisors (see below), whose sum is σ = 31856. Its totient is φ = 15924.

The previous prime is 23887. The next prime is 23893. The reversal of 23889 is 98832.

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 not a de Polignac number, because 23889 - 2¹ = 23887 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

23889 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (23887) 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, 3979 + ... + 3984.

It is an arithmetic number, because the mean of its divisors is an integer number (7964).

2²³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

23889 is a deficient number, since it is larger than the sum of its proper divisors (7967).

23889 is an equidigital number, since it uses as much as digits as its factorization.

23889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7966.

The product of its digits is 3456, while the sum is 30.

The square root of 23889 is about 154.5606677004. The cubic root of 23889 is about 28.8004533108.

The spelling of 23889 in words is "twenty-three thousand, eight hundred eighty-nine".