409843 has 4 divisors (see below), whose sum is σ = 468400. Its totient is φ = 351288.

The previous prime is 409841. The next prime is 409861. The reversal of 409843 is 348904.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 409843 - 2¹ = 409841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29268 + ... + 29281.

It is an arithmetic number, because the mean of its divisors is an integer number (117100).

2⁴⁰⁹⁸⁴³ is an apocalyptic number.

409843 is a deficient number, since it is larger than the sum of its proper divisors (58557).

409843 is an equidigital number, since it uses as much as digits as its factorization.

409843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58556.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 409843 is about 640.1898156016. The cubic root of 409843 is about 74.2801047117.

The spelling of 409843 in words is "four hundred nine thousand, eight hundred forty-three".