853009 has 4 divisors (see below), whose sum is σ = 903204. Its totient is φ = 802816.

The previous prime is 853007. The next prime is 853031. The reversal of 853009 is 900358.

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 801025 + 51984 = 895^2 + 228^2 .

It is a cyclic number.

It is not a de Polignac number, because 853009 - 2¹ = 853007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853007) 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, 25072 + ... + 25105.

It is an arithmetic number, because the mean of its divisors is an integer number (225801).

2⁸⁵³⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

853009 is a deficient number, since it is larger than the sum of its proper divisors (50195).

853009 is a wasteful number, since it uses less digits than its factorization.

853009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50194.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 853009 is about 923.5848634533. The cubic root of 853009 is about 94.8384697317.

Subtracting from 853009 its product of nonzero digits (1080), we obtain a square (851929 = 923²).

The spelling of 853009 in words is "eight hundred fifty-three thousand, nine".