23849 has 4 divisors (see below), whose sum is σ = 27264. Its totient is φ = 20436.

The previous prime is 23833. The next prime is 23857. The reversal of 23849 is 94832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23849 - 2⁴ = 23833 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697 + ... + 1710.

It is an arithmetic number, because the mean of its divisors is an integer number (6816).

2²³⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

23849 is a deficient number, since it is larger than the sum of its proper divisors (3415).

23849 is an equidigital number, since it uses as much as digits as its factorization.

23849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its digits is 1728, while the sum is 26.

The square root of 23849 is about 154.4312144613. The cubic root of 23849 is about 28.7843697337.

The spelling of 23849 in words is "twenty-three thousand, eight hundred forty-nine".