23724991 has 2 divisors, whose sum is σ = 23724992. Its totient is φ = 23724990.

The previous prime is 23724971. The next prime is 23725007. The reversal of 23724991 is 19942732.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23724991 - 2⁵ = 23724959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23724991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23724931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11862495 + 11862496.

It is an arithmetic number, because the mean of its divisors is an integer number (11862496).

Almost surely, 2^23724991 is an apocalyptic number.

23724991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23724991 is an equidigital number, since it uses as much as digits as its factorization.

23724991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 23724991 is about 4870.8306273160. The cubic root of 23724991 is about 287.3439243600.

The spelling of 23724991 in words is "twenty-three million, seven hundred twenty-four thousand, nine hundred ninety-one".