23911 has 2 divisors, whose sum is σ = 23912. Its totient is φ = 23910.

The previous prime is 23909. The next prime is 23917. The reversal of 23911 is 11932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23911 - 2¹ = 23909 is a prime.

Together with 23909, it forms a pair of twin primes.

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 (23917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11955 + 11956.

It is an arithmetic number, because the mean of its divisors is an integer number (11956).

2²³⁹¹¹ is an apocalyptic number.

23911 is a deficient number, since it is larger than the sum of its proper divisors (1).

23911 is an equidigital number, since it uses as much as digits as its factorization.

23911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 16.

The square root of 23911 is about 154.6318207873. The cubic root of 23911 is about 28.8092916264.

The spelling of 23911 in words is "twenty-three thousand, nine hundred eleven".