It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 238 209 is not a prime number.
For example, 238 209 can be divided by 3: 238 209 / 3 = 79 403.
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For 238 209 to be a prime number, it would have been required that 238 209 has only two divisors, i.e., itself and 1.
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238 209 is an odd number, because it is not evenly divisible by 2.
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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 238 209 is about 488.067.
Thus, the square root of 238 209 is not an integer, and therefore 238 209 is not a square number.
The square of a number (here 238 209) is the result of the product of this number (238 209) by itself (i.e., 238 209 × 238 209); the square of 238 209 is sometimes called "raising 238 209 to the power 2", or "238 209 squared".
The square of 238 209 is 56 743 527 681 because 238 209 × 238 209 = 238 2092 = 56 743 527 681.
As a consequence, 238 209 is the square root of 56 743 527 681.
The multiples of 238 209 are all integers evenly divisible by 238 209, that is all numbers such that the remainder of the division by 238 209 is zero. There are infinitely many multiples of 238 209. The smallest multiples of 238 209 are: