23164091 has 4 divisors (see below), whose sum is σ = 23656992. Its totient is φ = 22671192.

The previous prime is 23164087. The next prime is 23164117. The reversal of 23164091 is 19046132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23164091 - 2² = 23164087 is a prime.

It is a super-2 number, since 2×23164091² = 1073150223712562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23164091.

It is not an unprimeable number, because it can be changed into a prime (23164291) 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, 246380 + ... + 246473.

It is an arithmetic number, because the mean of its divisors is an integer number (5914248).

Almost surely, 2^23164091 is an apocalyptic number.

23164091 is a deficient number, since it is larger than the sum of its proper divisors (492901).

23164091 is an equidigital number, since it uses as much as digits as its factorization.

23164091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492900.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 23164091 is about 4812.9087878330. The cubic root of 23164091 is about 285.0614046413.

The spelling of 23164091 in words is "twenty-three million, one hundred sixty-four thousand, ninety-one".