Is 650 a prime number? What are the divisors of 650?

## Parity of 650

650 is an even number, because it is evenly divisible by 2: 650 / 2 = 325.

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## Is 650 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 650 is about 25.495.

Thus, the square root of 650 is not an integer, and therefore 650 is not a square number.

## What is the square number of 650?

The square of a number (here 650) is the result of the product of this number (650) by itself (i.e., 650 × 650); the square of 650 is sometimes called "raising 650 to the power 2", or "650 squared".

The square of 650 is 422 500 because 650 × 650 = 6502 = 422 500.

As a consequence, 650 is the square root of 422 500.

## Number of digits of 650

650 is a number with 3 digits.

## What are the multiples of 650?

The multiples of 650 are all integers evenly divisible by 650, that is all numbers such that the remainder of the division by 650 is zero. There are infinitely many multiples of 650. The smallest multiples of 650 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 650). 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 25.495). 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 650

• Preceding numbers: …648, 649
• Following numbers: 651, 652

### Nearest numbers from 650

• Preceding prime number: 647
• Following prime number: 653
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