43868491 has 2 divisors, whose sum is σ = 43868492. Its totient is φ = 43868490.

The previous prime is 43868459. The next prime is 43868501. The reversal of 43868491 is 19486834.

43868491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43868491 - 2⁵ = 43868459 is a prime.

It is not a weakly prime, because it can be changed into another prime (43862491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21934245 + 21934246.

It is an arithmetic number, because the mean of its divisors is an integer number (21934246).

Almost surely, 2^43868491 is an apocalyptic number.

43868491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43868491 is an equidigital number, since it uses as much as digits as its factorization.

43868491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 43868491 is about 6623.3292987741. The cubic root of 43868491 is about 352.6827608853.

The spelling of 43868491 in words is "forty-three million, eight hundred sixty-eight thousand, four hundred ninety-one".