It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 378 709 is not a prime number.
For example, 378 709 can be divided by 17: 378 709 / 17 = 22 277.
For 378 709 to be a prime number, it would have been required that 378 709 has only two divisors, i.e., itself and 1.
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378 709 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 378 709 is about 615.393.
Thus, the square root of 378 709 is not an integer, and therefore 378 709 is not a square number.
The square of a number (here 378 709) is the result of the product of this number (378 709) by itself (i.e., 378 709 × 378 709); the square of 378 709 is sometimes called "raising 378 709 to the power 2", or "378 709 squared".
The square of 378 709 is 143 420 506 681 because 378 709 × 378 709 = 378 7092 = 143 420 506 681.
As a consequence, 378 709 is the square root of 143 420 506 681.
The multiples of 378 709 are all integers evenly divisible by 378 709, that is all numbers such that the remainder of the division by 378 709 is zero. There are infinitely many multiples of 378 709. The smallest multiples of 378 709 are: