830209 has 4 divisors (see below), whose sum is σ = 850500. Its totient is φ = 809920.

The previous prime is 830191. The next prime is 830233. The reversal of 830209 is 902038.

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 124609 + 705600 = 353^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 830209 - 2⁵ = 830177 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 830209.

It is not an unprimeable number, because it can be changed into a prime (830279) 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, 10084 + ... + 10165.

It is an arithmetic number, because the mean of its divisors is an integer number (212625).

2⁸³⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

830209 is a deficient number, since it is larger than the sum of its proper divisors (20291).

830209 is a wasteful number, since it uses less digits than its factorization.

830209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20290.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 830209 is about 911.1580543462. The cubic root of 830209 is about 93.9858511977.

The spelling of 830209 in words is "eight hundred thirty thousand, two hundred nine".