It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 49 987 is not a prime number.
For example, 49 987 can be divided by 7: 49 987 / 7 = 7 141.
For 49 987 to be a prime number, it would have been required that 49 987 has only two divisors, i.e., itself and 1.
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49 987 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 49 987 is about 223.578.
Thus, the square root of 49 987 is not an integer, and therefore 49 987 is not a square number.
The square of a number (here 49 987) is the result of the product of this number (49 987) by itself (i.e., 49 987 × 49 987); the square of 49 987 is sometimes called "raising 49 987 to the power 2", or "49 987 squared".
The square of 49 987 is 2 498 700 169 because 49 987 × 49 987 = 49 9872 = 2 498 700 169.
As a consequence, 49 987 is the square root of 2 498 700 169.
The multiples of 49 987 are all integers evenly divisible by 49 987, that is all numbers such that the remainder of the division by 49 987 is zero. There are infinitely many multiples of 49 987. The smallest multiples of 49 987 are: