It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 195 013 is not a prime number.
For example, 195 013 can be divided by 7: 195 013 / 7 = 27 859.
For 195 013 to be a prime number, it would have been required that 195 013 has only two divisors, i.e., itself and 1.
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195 013 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 195 013 is about 441.603.
Thus, the square root of 195 013 is not an integer, and therefore 195 013 is not a square number.
The square of a number (here 195 013) is the result of the product of this number (195 013) by itself (i.e., 195 013 × 195 013); the square of 195 013 is sometimes called "raising 195 013 to the power 2", or "195 013 squared".
The square of 195 013 is 38 030 070 169 because 195 013 × 195 013 = 195 0132 = 38 030 070 169.
As a consequence, 195 013 is the square root of 38 030 070 169.
The multiples of 195 013 are all integers evenly divisible by 195 013, that is all numbers such that the remainder of the division by 195 013 is zero. There are infinitely many multiples of 195 013. The smallest multiples of 195 013 are: