23666957 has 2 divisors, whose sum is σ = 23666958. Its totient is φ = 23666956.

The previous prime is 23666947. The next prime is 23666959. The reversal of 23666957 is 75966632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23629321 + 37636 = 4861^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 23666957 - 2⁶ = 23666893 is a prime.

Together with 23666959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23666959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11833478 + 11833479.

It is an arithmetic number, because the mean of its divisors is an integer number (11833479).

Almost surely, 2^23666957 is an apocalyptic number.

It is an amenable number.

23666957 is a deficient number, since it is larger than the sum of its proper divisors (1).

23666957 is an equidigital number, since it uses as much as digits as its factorization.

23666957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 23666957 is about 4864.8696796523. The cubic root of 23666957 is about 287.1094411982.

The spelling of 23666957 in words is "twenty-three million, six hundred sixty-six thousand, nine hundred fifty-seven".