23949 has 8 divisors (see below), whose sum is σ = 35520. Its totient is φ = 15948.

The previous prime is 23929. The next prime is 23957. The reversal of 23949 is 94932.

It is not a de Polignac number, because 23949 - 2⁵ = 23917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 887 = 23949 / (2 + 3 + 9 + 4 + 9).

It is a d-powerful number, because it can be written as 2³ + 3⁹ + 9² + 4⁶ + 9² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417 + ... + 470.

It is an arithmetic number, because the mean of its divisors is an integer number (4440).

2²³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

23949 is a deficient number, since it is larger than the sum of its proper divisors (11571).

23949 is an equidigital number, since it uses as much as digits as its factorization.

23949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 890 counting only the distinct ones).

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

The square root of 23949 is about 154.7546445183. The cubic root of 23949 is about 28.8245450476.

It can be divided in two parts, 239 and 49, that multiplied together give a palindrome (11711).

The spelling of 23949 in words is "twenty-three thousand, nine hundred forty-nine".