23663 has 2 divisors, whose sum is σ = 23664. Its totient is φ = 23662.

The previous prime is 23633. The next prime is 23669. The reversal of 23663 is 36632.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23663 - 2⁶ = 23599 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11831 + 11832.

It is an arithmetic number, because the mean of its divisors is an integer number (11832).

2²³⁶⁶³ is an apocalyptic number.

23663 is a deficient number, since it is larger than the sum of its proper divisors (1).

23663 is an equidigital number, since it uses as much as digits as its factorization.

23663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 20.

The square root of 23663 is about 153.8278258313. The cubic root of 23663 is about 28.7093439206.

It can be divided in two parts, 23 and 663, that added together give a palindrome (686).

The spelling of 23663 in words is "twenty-three thousand, six hundred sixty-three".