Is 818 a prime number? What are the divisors of 818?

## Parity of 818

818 is an even number, because it is evenly divisible by 2: 818 / 2 = 409.

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## Is 818 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 818 is about 28.601.

Thus, the square root of 818 is not an integer, and therefore 818 is not a square number.

## What is the square number of 818?

The square of a number (here 818) is the result of the product of this number (818) by itself (i.e., 818 × 818); the square of 818 is sometimes called "raising 818 to the power 2", or "818 squared".

The square of 818 is 669 124 because 818 × 818 = 8182 = 669 124.

As a consequence, 818 is the square root of 669 124.

## Number of digits of 818

818 is a number with 3 digits.

## What are the multiples of 818?

The multiples of 818 are all integers evenly divisible by 818, that is all numbers such that the remainder of the division by 818 is zero. There are infinitely many multiples of 818. The smallest multiples of 818 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 818). 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 28.601). 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 818

• Preceding numbers: …816, 817
• Following numbers: 819, 820

### Nearest numbers from 818

• Preceding prime number: 811
• Following prime number: 821
Find out whether some integer is a prime number