409943 has 2 divisors, whose sum is σ = 409944. Its totient is φ = 409942.

The previous prime is 409933. The next prime is 409951. The reversal of 409943 is 349904.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409943 - 2⁶ = 409879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204971 + 204972.

It is an arithmetic number, because the mean of its divisors is an integer number (204972).

2⁴⁰⁹⁹⁴³ is an apocalyptic number.

409943 is a deficient number, since it is larger than the sum of its proper divisors (1).

409943 is an equidigital number, since it uses as much as digits as its factorization.

409943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 409943 is about 640.2679126741. The cubic root of 409943 is about 74.2861455667.

The spelling of 409943 in words is "four hundred nine thousand, nine hundred forty-three".