23149 has 4 divisors (see below), whose sum is σ = 26464. Its totient is φ = 19836.

The previous prime is 23143. The next prime is 23159. The reversal of 23149 is 94132.

23149 is nontrivially palindromic in base 8.

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 23149 - 2⁵ = 23117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23143) 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, 1647 + ... + 1660.

It is an arithmetic number, because the mean of its divisors is an integer number (6616).

2²³¹⁴⁹ is an apocalyptic number.

It is an amenable number.

23149 is a deficient number, since it is larger than the sum of its proper divisors (3315).

23149 is an equidigital number, since it uses as much as digits as its factorization.

23149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314.

The product of its digits is 216, while the sum is 19.

The square root of 23149 is about 152.1479543076. The cubic root of 23149 is about 28.4999487021.

The spelling of 23149 in words is "twenty-three thousand, one hundred forty-nine".