23166861 has 4 divisors (see below), whose sum is σ = 30889152. Its totient is φ = 15444572.

The previous prime is 23166851. The next prime is 23166893. The reversal of 23166861 is 16866132.

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 23166861 - 2⁶ = 23166797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23166811) 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, 3861141 + ... + 3861146.

It is an arithmetic number, because the mean of its divisors is an integer number (7722288).

Almost surely, 2^23166861 is an apocalyptic number.

It is an amenable number.

23166861 is a deficient number, since it is larger than the sum of its proper divisors (7722291).

23166861 is an equidigital number, since it uses as much as digits as its factorization.

23166861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722290.

The product of its digits is 10368, while the sum is 33.

The square root of 23166861 is about 4813.1965469945. The cubic root of 23166861 is about 285.0727668919.

The spelling of 23166861 in words is "twenty-three million, one hundred sixty-six thousand, eight hundred sixty-one".