409853 has 4 divisors (see below), whose sum is σ = 433980. Its totient is φ = 385728.

The previous prime is 409841. The next prime is 409861. The reversal of 409853 is 358904.

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

It can be written as a sum of positive squares in 2 ways, for example, as 289444 + 120409 = 538^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 409853 - 2⁸ = 409597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409813) 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, 12038 + ... + 12071.

It is an arithmetic number, because the mean of its divisors is an integer number (108495).

2⁴⁰⁹⁸⁵³ is an apocalyptic number.

It is an amenable number.

409853 is a deficient number, since it is larger than the sum of its proper divisors (24127).

409853 is a wasteful number, since it uses less digits than its factorization.

409853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24126.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 409853 is about 640.1976257376. The cubic root of 409853 is about 74.2807088414.

The spelling of 409853 in words is "four hundred nine thousand, eight hundred fifty-three".