It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 137 776 is not a prime number.
For example, 137 776 can be divided by 2: 137 776 / 2 = 68 888.
For 137 776 to be a prime number, it would have been required that 137 776 has only two divisors, i.e., itself and 1.
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137 776 is an even number, because it is evenly divisible by 2: 137 776 / 2 = 68 888.
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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 137 776 is about 371.182.
Thus, the square root of 137 776 is not an integer, and therefore 137 776 is not a square number.
The square of a number (here 137 776) is the result of the product of this number (137 776) by itself (i.e., 137 776 × 137 776); the square of 137 776 is sometimes called "raising 137 776 to the power 2", or "137 776 squared".
The square of 137 776 is 18 982 226 176 because 137 776 × 137 776 = 137 7762 = 18 982 226 176.
As a consequence, 137 776 is the square root of 18 982 226 176.
The multiples of 137 776 are all integers evenly divisible by 137 776, that is all numbers such that the remainder of the division by 137 776 is zero. There are infinitely many multiples of 137 776. The smallest multiples of 137 776 are: