Is 620 a prime number? What are the divisors of 620?

## Parity of 620

620 is an even number, because it is evenly divisible by 2: 620 / 2 = 310.

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## Is 620 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 620 is about 24.900.

Thus, the square root of 620 is not an integer, and therefore 620 is not a square number.

## What is the square number of 620?

The square of a number (here 620) is the result of the product of this number (620) by itself (i.e., 620 × 620); the square of 620 is sometimes called "raising 620 to the power 2", or "620 squared".

The square of 620 is 384 400 because 620 × 620 = 6202 = 384 400.

As a consequence, 620 is the square root of 384 400.

## Number of digits of 620

620 is a number with 3 digits.

## What are the multiples of 620?

The multiples of 620 are all integers evenly divisible by 620, that is all numbers such that the remainder of the division by 620 is zero. There are infinitely many multiples of 620. The smallest multiples of 620 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 620). 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 24.900). 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 620

• Preceding numbers: …618, 619
• Following numbers: 621, 622

### Nearest numbers from 620

• Preceding prime number: 619
• Following prime number: 631
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