23132891 has 4 divisors (see below), whose sum is σ = 23207112. Its totient is φ = 23058672.

The previous prime is 23132843. The next prime is 23132909. The reversal of 23132891 is 19823132.

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 23132891 - 2¹⁴ = 23116507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23132821) 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, 36641 + ... + 37266.

It is an arithmetic number, because the mean of its divisors is an integer number (5801778).

Almost surely, 2^23132891 is an apocalyptic number.

23132891 is a deficient number, since it is larger than the sum of its proper divisors (74221).

23132891 is an equidigital number, since it uses as much as digits as its factorization.

23132891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74220.

The product of its digits is 2592, while the sum is 29.

The square root of 23132891 is about 4809.6664125488. Note that the first 3 decimals coincide. The cubic root of 23132891 is about 284.9333628959.

The spelling of 23132891 in words is "twenty-three million, one hundred thirty-two thousand, eight hundred ninety-one".