It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 739 721 is not a prime number.
For example, 739 721 can be divided by 17: 739 721 / 17 = 43 513.
For 739 721 to be a prime number, it would have been required that 739 721 has only two divisors, i.e., itself and 1.
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739 721 is an odd number, because it is not evenly divisible by 2.
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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 739 721 is about 860.070.
Thus, the square root of 739 721 is not an integer, and therefore 739 721 is not a square number.
The square of a number (here 739 721) is the result of the product of this number (739 721) by itself (i.e., 739 721 × 739 721); the square of 739 721 is sometimes called "raising 739 721 to the power 2", or "739 721 squared".
The square of 739 721 is 547 187 157 841 because 739 721 × 739 721 = 739 7212 = 547 187 157 841.
As a consequence, 739 721 is the square root of 547 187 157 841.
The multiples of 739 721 are all integers evenly divisible by 739 721, that is all numbers such that the remainder of the division by 739 721 is zero. There are infinitely many multiples of 739 721. The smallest multiples of 739 721 are: