409543 has 2 divisors, whose sum is σ = 409544. Its totient is φ = 409542.

The previous prime is 409529. The next prime is 409573. The reversal of 409543 is 345904.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409543 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409523) 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, 204771 + 204772.

It is an arithmetic number, because the mean of its divisors is an integer number (204772).

2⁴⁰⁹⁵⁴³ is an apocalyptic number.

409543 is a deficient number, since it is larger than the sum of its proper divisors (1).

409543 is an equidigital number, since it uses as much as digits as its factorization.

409543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 409543 is about 639.9554672006. The cubic root of 409543 is about 74.2619762488.

The spelling of 409543 in words is "four hundred nine thousand, five hundred forty-three".