It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 340 997 is not a prime number.
For example, 340 997 can be divided by 41: 340 997 / 41 = 8 317.
For 340 997 to be a prime number, it would have been required that 340 997 has only two divisors, i.e., itself and 1.
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340 997 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 340 997 is about 583.949.
Thus, the square root of 340 997 is not an integer, and therefore 340 997 is not a square number.
The square of a number (here 340 997) is the result of the product of this number (340 997) by itself (i.e., 340 997 × 340 997); the square of 340 997 is sometimes called "raising 340 997 to the power 2", or "340 997 squared".
The square of 340 997 is 116 278 954 009 because 340 997 × 340 997 = 340 9972 = 116 278 954 009.
As a consequence, 340 997 is the square root of 116 278 954 009.
The multiples of 340 997 are all integers evenly divisible by 340 997, that is all numbers such that the remainder of the division by 340 997 is zero. There are infinitely many multiples of 340 997. The smallest multiples of 340 997 are: