23823 has 6 divisors (see below), whose sum is σ = 34424. Its totient is φ = 15876.

The previous prime is 23819. The next prime is 23827. The reversal of 23823 is 32832.

It is an interprime number because it is at equal distance from previous prime (23819) and next prime (23827).

It is not a de Polignac number, because 23823 - 2² = 23819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23796 and 23805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23827) 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, 1315 + ... + 1332.

2²³⁸²³ is an apocalyptic number.

23823 is a deficient number, since it is larger than the sum of its proper divisors (10601).

23823 is a wasteful number, since it uses less digits than its factorization.

23823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2650 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 23823 is about 154.3470116329. The cubic root of 23823 is about 28.7739057626.

Subtracting 23823 from its reverse (32832), we obtain a palindrome (9009).

The spelling of 23823 in words is "twenty-three thousand, eight hundred twenty-three".