23381993 has 2 divisors, whose sum is σ = 23381994. Its totient is φ = 23381992.

The previous prime is 23381929. The next prime is 23382011. The reversal of 23381993 is 39918332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13446889 + 9935104 = 3667^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 23381993 - 2⁶ = 23381929 is a prime.

It is not a weakly prime, because it can be changed into another prime (23381923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11690996 + 11690997.

It is an arithmetic number, because the mean of its divisors is an integer number (11690997).

Almost surely, 2^23381993 is an apocalyptic number.

It is an amenable number.

23381993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23381993 is an equidigital number, since it uses as much as digits as its factorization.

23381993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 23381993 is about 4835.4930462157. The cubic root of 23381993 is about 285.9524632877.

The spelling of 23381993 in words is "twenty-three million, three hundred eighty-one thousand, nine hundred ninety-three".