23749 has 8 divisors (see below), whose sum is σ = 27648. Its totient is φ = 20160.

The previous prime is 23747. The next prime is 23753. The reversal of 23749 is 94732.

23749 is nontrivially palindromic in base 16.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23749 - 2¹ = 23747 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 3⁷ + 7⁴ + 4⁷ + 9³ .

It is a Duffinian number.

It is a plaindrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23741) 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, 124 + ... + 250.

It is an arithmetic number, because the mean of its divisors is an integer number (3456).

2²³⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

23749 is a deficient number, since it is larger than the sum of its proper divisors (3899).

23749 is a wasteful number, since it uses less digits than its factorization.

23749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155.

The product of its digits is 1512, while the sum is 25.

The square root of 23749 is about 154.1071056116. The cubic root of 23749 is about 28.7440819577.

The spelling of 23749 in words is "twenty-three thousand, seven hundred forty-nine".