It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 198 001 is not a prime number.
For example, 198 001 can be divided by 389: 198 001 / 389 = 509.
For 198 001 to be a prime number, it would have been required that 198 001 has only two divisors, i.e., itself and 1.
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198 001 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 198 001 is about 444.973.
Thus, the square root of 198 001 is not an integer, and therefore 198 001 is not a square number.
The square of a number (here 198 001) is the result of the product of this number (198 001) by itself (i.e., 198 001 × 198 001); the square of 198 001 is sometimes called "raising 198 001 to the power 2", or "198 001 squared".
The square of 198 001 is 39 204 396 001 because 198 001 × 198 001 = 198 0012 = 39 204 396 001.
As a consequence, 198 001 is the square root of 39 204 396 001.
The multiples of 198 001 are all integers evenly divisible by 198 001, that is all numbers such that the remainder of the division by 198 001 is zero. There are infinitely many multiples of 198 001. The smallest multiples of 198 001 are: