It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 166 378 is not a prime number.
For example, 397 166 378 can be divided by 2: 397 166 378 / 2 = 198 583 189.
For 397 166 378 to be a prime number, it would have been required that 397 166 378 has only two divisors, i.e., itself and 1.
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397 166 378 is an even number, because it is evenly divisible by 2: 397 166 378 / 2 = 198 583 189.
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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 397 166 378 is about 19 929.034.
Thus, the square root of 397 166 378 is not an integer, and therefore 397 166 378 is not a square number.
The square of a number (here 397 166 378) is the result of the product of this number (397 166 378) by itself (i.e., 397 166 378 × 397 166 378); the square of 397 166 378 is sometimes called "raising 397 166 378 to the power 2", or "397 166 378 squared".
The square of 397 166 378 is 157 741 131 813 638 880 because 397 166 378 × 397 166 378 = 397 166 3782 = 157 741 131 813 638 880.
As a consequence, 397 166 378 is the square root of 157 741 131 813 638 880.
397 166 378 is a number with 9 digits.
The multiples of 397 166 378 are all integers evenly divisible by 397 166 378, that is all numbers such that the remainder of the division by 397 166 378 is zero. There are infinitely many multiples of 397 166 378. The smallest multiples of 397 166 378 are: