It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 137 804 is not a prime number.
For example, 137 804 can be divided by 2: 137 804 / 2 = 68 902.
For 137 804 to be a prime number, it would have been required that 137 804 has only two divisors, i.e., itself and 1.
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137 804 is an even number, because it is evenly divisible by 2: 137 804 / 2 = 68 902.
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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 137 804 is about 371.220.
Thus, the square root of 137 804 is not an integer, and therefore 137 804 is not a square number.
The square of a number (here 137 804) is the result of the product of this number (137 804) by itself (i.e., 137 804 × 137 804); the square of 137 804 is sometimes called "raising 137 804 to the power 2", or "137 804 squared".
The square of 137 804 is 18 989 942 416 because 137 804 × 137 804 = 137 8042 = 18 989 942 416.
As a consequence, 137 804 is the square root of 18 989 942 416.
The multiples of 137 804 are all integers evenly divisible by 137 804, that is all numbers such that the remainder of the division by 137 804 is zero. There are infinitely many multiples of 137 804. The smallest multiples of 137 804 are: