43668419 has 2 divisors, whose sum is σ = 43668420. Its totient is φ = 43668418.

The previous prime is 43668413. The next prime is 43668431. The reversal of 43668419 is 91486634.

43668419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43668419 is a prime.

It is a super-2 number, since 2×43668419² = 3813861635919122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (43668413) 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, 21834209 + 21834210.

It is an arithmetic number, because the mean of its divisors is an integer number (21834210).

Almost surely, 2^43668419 is an apocalyptic number.

43668419 is a deficient number, since it is larger than the sum of its proper divisors (1).

43668419 is an equidigital number, since it uses as much as digits as its factorization.

43668419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 43668419 is about 6608.2084561551. The cubic root of 43668419 is about 352.1457810205.

The spelling of 43668419 in words is "forty-three million, six hundred sixty-eight thousand, four hundred nineteen".