23109 has 4 divisors (see below), whose sum is σ = 30816. Its totient is φ = 15404.

The previous prime is 23099. The next prime is 23117. The reversal of 23109 is 90132.

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 23109 - 2⁸ = 22853 is a prime.

It is a D-number.

It is a Curzon number.

23109 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849 + ... + 3854.

It is an arithmetic number, because the mean of its divisors is an integer number (7704).

2²³¹⁰⁹ is an apocalyptic number.

It is an amenable number.

23109 is a deficient number, since it is larger than the sum of its proper divisors (7707).

23109 is an equidigital number, since it uses as much as digits as its factorization.

23109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 23109 is about 152.0164464787. The cubic root of 23109 is about 28.4835238717.

The spelling of 23109 in words is "twenty-three thousand, one hundred nine".