It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 498 121 638 is not a prime number.
For example, 498 121 638 can be divided by 2: 498 121 638 / 2 = 249 060 819.
For 498 121 638 to be a prime number, it would have been required that 498 121 638 has only two divisors, i.e., itself and 1.
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498 121 638 is an even number, because it is evenly divisible by 2: 498 121 638 / 2 = 249 060 819.
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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 498 121 638 is about 22 318.639.
Thus, the square root of 498 121 638 is not an integer, and therefore 498 121 638 is not a square number.
The square of a number (here 498 121 638) is the result of the product of this number (498 121 638) by itself (i.e., 498 121 638 × 498 121 638); the square of 498 121 638 is sometimes called "raising 498 121 638 to the power 2", or "498 121 638 squared".
The square of 498 121 638 is 248 125 166 243 803 040 because 498 121 638 × 498 121 638 = 498 121 6382 = 248 125 166 243 803 040.
As a consequence, 498 121 638 is the square root of 248 125 166 243 803 040.
498 121 638 is a number with 9 digits.
The multiples of 498 121 638 are all integers evenly divisible by 498 121 638, that is all numbers such that the remainder of the division by 498 121 638 is zero. There are infinitely many multiples of 498 121 638. The smallest multiples of 498 121 638 are: