23974991 has 2 divisors, whose sum is σ = 23974992. Its totient is φ = 23974990.

The previous prime is 23974987. The next prime is 23975011. The reversal of 23974991 is 19947932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23974991 - 2² = 23974987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23974931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11987495 + 11987496.

It is an arithmetic number, because the mean of its divisors is an integer number (11987496).

Almost surely, 2^23974991 is an apocalyptic number.

23974991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23974991 is an equidigital number, since it uses as much as digits as its factorization.

23974991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 23974991 is about 4896.4263499005. The cubic root of 23974991 is about 288.3496869634.

The spelling of 23974991 in words is "twenty-three million, nine hundred seventy-four thousand, nine hundred ninety-one".