It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 137 604 is not a prime number.
For example, 137 604 can be divided by 2: 137 604 / 2 = 68 802.
For 137 604 to be a prime number, it would have been required that 137 604 has only two divisors, i.e., itself and 1.
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137 604 is an even number, because it is evenly divisible by 2: 137 604 / 2 = 68 802.
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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 137 604 is about 370.950.
Thus, the square root of 137 604 is not an integer, and therefore 137 604 is not a square number.
The square of a number (here 137 604) is the result of the product of this number (137 604) by itself (i.e., 137 604 × 137 604); the square of 137 604 is sometimes called "raising 137 604 to the power 2", or "137 604 squared".
The square of 137 604 is 18 934 860 816 because 137 604 × 137 604 = 137 6042 = 18 934 860 816.
As a consequence, 137 604 is the square root of 18 934 860 816.
The multiples of 137 604 are all integers evenly divisible by 137 604, that is all numbers such that the remainder of the division by 137 604 is zero. There are infinitely many multiples of 137 604. The smallest multiples of 137 604 are: