23842991 has 2 divisors, whose sum is σ = 23842992. Its totient is φ = 23842990.

The previous prime is 23842943. The next prime is 23842997. The reversal of 23842991 is 19924832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23842991 - 2¹⁰ = 23841967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23842997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11921495 + 11921496.

It is an arithmetic number, because the mean of its divisors is an integer number (11921496).

Almost surely, 2^23842991 is an apocalyptic number.

23842991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23842991 is an equidigital number, since it uses as much as digits as its factorization.

23842991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 23842991 is about 4882.9285270215. The cubic root of 23842991 is about 287.8195202500.

The spelling of 23842991 in words is "twenty-three million, eight hundred forty-two thousand, nine hundred ninety-one".