6409943 has 2 divisors, whose sum is σ = 6409944. Its totient is φ = 6409942.

The previous prime is 6409933. The next prime is 6410009. The reversal of 6409943 is 3499046.

It is a happy number.

6409943 is digitally balanced in base 3, 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 not a de Polignac number, because 6409943 - 2¹⁶ = 6344407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6409913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3204971 + 3204972.

It is an arithmetic number, because the mean of its divisors is an integer number (3204972).

Almost surely, 2^6409943 is an apocalyptic number.

6409943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6409943 is an equidigital number, since it uses as much as digits as its factorization.

6409943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 6409943 is about 2531.7865233862. The cubic root of 6409943 is about 185.7596521742.

The spelling of 6409943 in words is "six million, four hundred nine thousand, nine hundred forty-three".