409443943 has 2 divisors, whose sum is σ = 409443944. Its totient is φ = 409443942.

The previous prime is 409443883. The next prime is 409443967. The reversal of 409443943 is 349344904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409443943 - 2²⁵ = 375889511 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 409443896 and 409443905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409413943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204721971 + 204721972.

It is an arithmetic number, because the mean of its divisors is an integer number (204721972).

Almost surely, 2^409443943 is an apocalyptic number.

409443943 is a deficient number, since it is larger than the sum of its proper divisors (1).

409443943 is an equidigital number, since it uses as much as digits as its factorization.

409443943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 409443943 is about 20234.7212236789. The cubic root of 409443943 is about 742.5598846749.

The spelling of 409443943 in words is "four hundred nine million, four hundred forty-three thousand, nine hundred forty-three".