It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 737 644 is not a prime number.
For example, 737 644 can be divided by 2: 737 644 / 2 = 368 822.
For 737 644 to be a prime number, it would have been required that 737 644 has only two divisors, i.e., itself and 1.
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737 644 is an even number, because it is evenly divisible by 2: 737 644 / 2 = 368 822.
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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 737 644 is about 858.862.
Thus, the square root of 737 644 is not an integer, and therefore 737 644 is not a square number.
The square of a number (here 737 644) is the result of the product of this number (737 644) by itself (i.e., 737 644 × 737 644); the square of 737 644 is sometimes called "raising 737 644 to the power 2", or "737 644 squared".
The square of 737 644 is 544 118 670 736 because 737 644 × 737 644 = 737 6442 = 544 118 670 736.
As a consequence, 737 644 is the square root of 544 118 670 736.
The multiples of 737 644 are all integers evenly divisible by 737 644, that is all numbers such that the remainder of the division by 737 644 is zero. There are infinitely many multiples of 737 644. The smallest multiples of 737 644 are: