23869 has 2 divisors, whose sum is σ = 23870. Its totient is φ = 23868.

The previous prime is 23857. The next prime is 23873. The reversal of 23869 is 96832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22500 + 1369 = 150^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 23869 - 2⁷ = 23741 is a prime.

It is a super-2 number, since 2×23869² = 1139458322, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11934 + 11935.

It is an arithmetic number, because the mean of its divisors is an integer number (11935).

2²³⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

23869 is a deficient number, since it is larger than the sum of its proper divisors (1).

23869 is an equidigital number, since it uses as much as digits as its factorization.

23869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 23869 is about 154.4959546396. The cubic root of 23869 is about 28.7924137683.

The spelling of 23869 in words is "twenty-three thousand, eight hundred sixty-nine".