23666997 has 4 divisors (see below), whose sum is σ = 31556000. Its totient is φ = 15777996.

The previous prime is 23666983. The next prime is 23667019. The reversal of 23666997 is 79966632.

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 not a de Polignac number, because 23666997 - 2¹⁰ = 23665973 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3944497 + ... + 3944502.

It is an arithmetic number, because the mean of its divisors is an integer number (7889000).

Almost surely, 2^23666997 is an apocalyptic number.

It is an amenable number.

23666997 is a deficient number, since it is larger than the sum of its proper divisors (7889003).

23666997 is an equidigital number, since it uses as much as digits as its factorization.

23666997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889002.

The product of its digits is 734832, while the sum is 48.

The square root of 23666997 is about 4864.8737907576. The cubic root of 23666997 is about 287.1096029479.

The spelling of 23666997 in words is "twenty-three million, six hundred sixty-six thousand, nine hundred ninety-seven".