23994991 has 2 divisors, whose sum is σ = 23994992. Its totient is φ = 23994990.

The previous prime is 23994979. The next prime is 23995001. The reversal of 23994991 is 19949932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23994991 - 2⁵ = 23994959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23994941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11997495 + 11997496.

It is an arithmetic number, because the mean of its divisors is an integer number (11997496).

Almost surely, 2^23994991 is an apocalyptic number.

23994991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23994991 is an equidigital number, since it uses as much as digits as its factorization.

23994991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 46.

The square root of 23994991 is about 4898.4682299674. The cubic root of 23994991 is about 288.4298453650.

It can be divided in two parts, 2 and 3994991, that added together give a palindrome (3994993).

The spelling of 23994991 in words is "twenty-three million, nine hundred ninety-four thousand, nine hundred ninety-one".