23666943 has 4 divisors (see below), whose sum is σ = 31555928. Its totient is φ = 15777960.

The previous prime is 23666893. The next prime is 23666947. The reversal of 23666943 is 34966632.

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

It is not a de Polignac number, because 23666943 - 2¹⁶ = 23601407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23666947) 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, 3944488 + ... + 3944493.

It is an arithmetic number, because the mean of its divisors is an integer number (7888982).

Almost surely, 2^23666943 is an apocalyptic number.

23666943 is a deficient number, since it is larger than the sum of its proper divisors (7888985).

23666943 is an equidigital number, since it uses as much as digits as its factorization.

23666943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888984.

The product of its digits is 139968, while the sum is 39.

The square root of 23666943 is about 4864.8682407646. The cubic root of 23666943 is about 287.1093845858.

The spelling of 23666943 in words is "twenty-three million, six hundred sixty-six thousand, nine hundred forty-three".