Is 439 a prime number? What are the divisors of 439?

## Parity of 439

439 is an odd number, because it is not evenly divisible by 2.

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## Is 439 a perfect square number?

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 439 is about 20.952.

Thus, the square root of 439 is not an integer, and therefore 439 is not a square number.

Anyway, 439 is a prime number, and a prime number cannot be a perfect square.

## What is the square number of 439?

The square of a number (here 439) is the result of the product of this number (439) by itself (i.e., 439 × 439); the square of 439 is sometimes called "raising 439 to the power 2", or "439 squared".

The square of 439 is 192 721 because 439 × 439 = 4392 = 192 721.

As a consequence, 439 is the square root of 192 721.

## Number of digits of 439

439 is a number with 3 digits.

## What are the multiples of 439?

The multiples of 439 are all integers evenly divisible by 439, that is all numbers such that the remainder of the division by 439 is zero. There are infinitely many multiples of 439. The smallest multiples of 439 are:

## How to determine whether an integer is a prime number?

To determine the primality of a number, several algorithms can be used. The most naive technique is to test all divisors strictly smaller to the number of which we want to determine the primality (here 439). First, we can eliminate all even numbers greater than 2 (and hence 4, 6, 8…). Then, we can stop this check when we reach the square root of the number of which we want to determine the primality (here the square root is about 20.952). Historically, the sieve of Eratosthenes (dating from the Greek mathematics) implements this technique in a relatively efficient manner.

More modern techniques include the sieve of Atkin, probabilistic algorithms, and the cyclotomic AKS test.

## Numbers near 439

• Preceding numbers: …437, 438
• Following numbers: 440, 441

### Nearest numbers from 439

• Preceding prime number: 433
• Following prime number: 443
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