409863 has 4 divisors (see below), whose sum is σ = 546488. Its totient is φ = 273240.

The previous prime is 409861. The next prime is 409867. The reversal of 409863 is 368904.

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

It is not a de Polignac number, because 409863 - 2¹ = 409861 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68308 + ... + 68313.

It is an arithmetic number, because the mean of its divisors is an integer number (136622).

2⁴⁰⁹⁸⁶³ is an apocalyptic number.

409863 is a deficient number, since it is larger than the sum of its proper divisors (136625).

409863 is a wasteful number, since it uses less digits than its factorization.

409863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136624.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 409863 is about 640.2054357782. The cubic root of 409863 is about 74.2813129613.

The spelling of 409863 in words is "four hundred nine thousand, eight hundred sixty-three".