It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 49 209 is not a prime number.
For example, 49 209 can be divided by 3: 49 209 / 3 = 16 403.
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For 49 209 to be a prime number, it would have been required that 49 209 has only two divisors, i.e., itself and 1.
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49 209 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 49 209 is about 221.831.
Thus, the square root of 49 209 is not an integer, and therefore 49 209 is not a square number.
The square of a number (here 49 209) is the result of the product of this number (49 209) by itself (i.e., 49 209 × 49 209); the square of 49 209 is sometimes called "raising 49 209 to the power 2", or "49 209 squared".
The square of 49 209 is 2 421 525 681 because 49 209 × 49 209 = 49 2092 = 2 421 525 681.
As a consequence, 49 209 is the square root of 2 421 525 681.
The multiples of 49 209 are all integers evenly divisible by 49 209, that is all numbers such that the remainder of the division by 49 209 is zero. There are infinitely many multiples of 49 209. The smallest multiples of 49 209 are: