24081991 has 2 divisors, whose sum is σ = 24081992. Its totient is φ = 24081990.

The previous prime is 24081983. The next prime is 24082031. The reversal of 24081991 is 19918042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24081991 - 2³ = 24081983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24081691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12040995 + 12040996.

It is an arithmetic number, because the mean of its divisors is an integer number (12040996).

Almost surely, 2^24081991 is an apocalyptic number.

24081991 is a deficient number, since it is larger than the sum of its proper divisors (1).

24081991 is an equidigital number, since it uses as much as digits as its factorization.

24081991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 24081991 is about 4907.3405221158. The cubic root of 24081991 is about 288.7780170587.

The spelling of 24081991 in words is "twenty-four million, eighty-one thousand, nine hundred ninety-one".