23663689 has 4 divisors (see below), whose sum is σ = 27044224. Its totient is φ = 20283156.

The previous prime is 23663671. The next prime is 23663693. The reversal of 23663689 is 98636632.

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 23663689 - 2⁹ = 23663177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23663659) 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, 1690257 + ... + 1690270.

It is an arithmetic number, because the mean of its divisors is an integer number (6761056).

Almost surely, 2^23663689 is an apocalyptic number.

It is an amenable number.

23663689 is a deficient number, since it is larger than the sum of its proper divisors (3380535).

23663689 is an equidigital number, since it uses as much as digits as its factorization.

23663689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380534.

The product of its digits is 279936, while the sum is 43.

The square root of 23663689 is about 4864.5337906114. The cubic root of 23663689 is about 287.0962256302.

The spelling of 23663689 in words is "twenty-three million, six hundred sixty-three thousand, six hundred eighty-nine".