23091 has 8 divisors (see below), whose sum is σ = 31680. Its totient is φ = 14952.

The previous prime is 23087. The next prime is 23099. The reversal of 23091 is 19032.

23091 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 23091 - 2² = 23087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23091.

It is not an unprimeable number, because it can be changed into a prime (23099) 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, 40 + ... + 218.

It is an arithmetic number, because the mean of its divisors is an integer number (3960).

2²³⁰⁹¹ is an apocalyptic number.

23091 is a deficient number, since it is larger than the sum of its proper divisors (8589).

23091 is a wasteful number, since it uses less digits than its factorization.

23091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225.

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

The square root of 23091 is about 151.9572308250. The cubic root of 23091 is about 28.4761265142.

The spelling of 23091 in words is "twenty-three thousand, ninety-one".