23499 has 12 divisors (see below), whose sum is σ = 38896. Its totient is φ = 13392.

The previous prime is 23497. The next prime is 23509. The reversal of 23499 is 99432.

It is not a de Polignac number, because 23499 - 2¹ = 23497 is a prime.

It is a Duffinian number.

23499 is a lucky number.

It is a plaindrome in base 5 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124 + ... + 249.

2²³⁴⁹⁹ is an apocalyptic number.

23499 is a deficient number, since it is larger than the sum of its proper divisors (15397).

23499 is a wasteful number, since it uses less digits than its factorization.

23499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 383 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 23499 is about 153.2938354925. The cubic root of 23499 is about 28.6428652866.

It can be divided in two parts, 234 and 99, that added together give a palindrome (333).

The spelling of 23499 in words is "twenty-three thousand, four hundred ninety-nine".