23963 has 4 divisors (see below), whose sum is σ = 24768. Its totient is φ = 23160.

The previous prime is 23957. The next prime is 23971. The reversal of 23963 is 36932.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23963 - 2⁶ = 23899 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 3⁷ + 9 + 6² + 3⁹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23993) 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, 356 + ... + 417.

It is an arithmetic number, because the mean of its divisors is an integer number (6192).

2²³⁹⁶³ is an apocalyptic number.

23963 is a deficient number, since it is larger than the sum of its proper divisors (805).

23963 is an equidigital number, since it uses as much as digits as its factorization.

23963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804.

The product of its digits is 972, while the sum is 23.

The square root of 23963 is about 154.7998708010. The cubic root of 23963 is about 28.8301606616.

The spelling of 23963 in words is "twenty-three thousand, nine hundred sixty-three".