23993 has 2 divisors, whose sum is σ = 23994. Its totient is φ = 23992.

The previous prime is 23981. The next prime is 24001. The reversal of 23993 is 39932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12544 + 11449 = 112^2 + 107^2 .

23993 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 23993 - 2⁴ = 23977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11996 + 11997.

It is an arithmetic number, because the mean of its divisors is an integer number (11997).

2²³⁹⁹³ is an apocalyptic number.

It is an amenable number.

23993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23993 is an equidigital number, since it uses as much as digits as its factorization.

23993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 26.

The square root of 23993 is about 154.8967397978. The cubic root of 23993 is about 28.8421867593.

The spelling of 23993 in words is "twenty-three thousand, nine hundred ninety-three".