23913 has 6 divisors (see below), whose sum is σ = 34554. Its totient is φ = 15936.

The previous prime is 23911. The next prime is 23917. The reversal of 23913 is 31932.

It can be written as a sum of positive squares in only one way, i.e., 21609 + 2304 = 147^2 + 48^2 .

It is not a de Polignac number, because 23913 - 2¹ = 23911 is a prime.

It is an Ulam number.

23913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (23911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1320 + ... + 1337.

It is an arithmetic number, because the mean of its divisors is an integer number (5759).

2²³⁹¹³ is an apocalyptic number.

It is an amenable number.

23913 is a deficient number, since it is larger than the sum of its proper divisors (10641).

23913 is a wasteful number, since it uses less digits than its factorization.

23913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663 (or 2660 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 23913 is about 154.6382876263. The cubic root of 23913 is about 28.8100948408.

It can be divided in two parts, 239 and 13, that added together give a palindrome (252).

The spelling of 23913 in words is "twenty-three thousand, nine hundred thirteen".