23993591 has 2 divisors, whose sum is σ = 23993592. Its totient is φ = 23993590.

The previous prime is 23993587. The next prime is 23993609. The reversal of 23993591 is 19539932.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23993591 - 2² = 23993587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23993581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11996795 + 11996796.

It is an arithmetic number, because the mean of its divisors is an integer number (11996796).

Almost surely, 2^23993591 is an apocalyptic number.

23993591 is a deficient number, since it is larger than the sum of its proper divisors (1).

23993591 is an equidigital number, since it uses as much as digits as its factorization.

23993591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 41.

The square root of 23993591 is about 4898.3253260681. The cubic root of 23993591 is about 288.4242357270.

The spelling of 23993591 in words is "twenty-three million, nine hundred ninety-three thousand, five hundred ninety-one".