It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 170 161 is not a prime number.
For example, 170 161 can be divided by 263: 170 161 / 263 = 647.
For 170 161 to be a prime number, it would have been required that 170 161 has only two divisors, i.e., itself and 1.
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170 161 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 170 161 is about 412.506.
Thus, the square root of 170 161 is not an integer, and therefore 170 161 is not a square number.
The square of a number (here 170 161) is the result of the product of this number (170 161) by itself (i.e., 170 161 × 170 161); the square of 170 161 is sometimes called "raising 170 161 to the power 2", or "170 161 squared".
The square of 170 161 is 28 954 765 921 because 170 161 × 170 161 = 170 1612 = 28 954 765 921.
As a consequence, 170 161 is the square root of 28 954 765 921.
The multiples of 170 161 are all integers evenly divisible by 170 161, that is all numbers such that the remainder of the division by 170 161 is zero. There are infinitely many multiples of 170 161. The smallest multiples of 170 161 are: