It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 273 664 is not a prime number.
For example, 273 664 can be divided by 2: 273 664 / 2 = 136 832.
For 273 664 to be a prime number, it would have been required that 273 664 has only two divisors, i.e., itself and 1.
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273 664 is an even number, because it is evenly divisible by 2: 273 664 / 2 = 136 832.
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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 273 664 is about 523.129.
Thus, the square root of 273 664 is not an integer, and therefore 273 664 is not a square number.
The square of a number (here 273 664) is the result of the product of this number (273 664) by itself (i.e., 273 664 × 273 664); the square of 273 664 is sometimes called "raising 273 664 to the power 2", or "273 664 squared".
The square of 273 664 is 74 891 984 896 because 273 664 × 273 664 = 273 6642 = 74 891 984 896.
As a consequence, 273 664 is the square root of 74 891 984 896.
The multiples of 273 664 are all integers evenly divisible by 273 664, that is all numbers such that the remainder of the division by 273 664 is zero. There are infinitely many multiples of 273 664. The smallest multiples of 273 664 are: