It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 136 243 is not a prime number.
For example, 136 243 can be divided by 41: 136 243 / 41 = 3 323.
For 136 243 to be a prime number, it would have been required that 136 243 has only two divisors, i.e., itself and 1.
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136 243 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 136 243 is about 369.111.
Thus, the square root of 136 243 is not an integer, and therefore 136 243 is not a square number.
The square of a number (here 136 243) is the result of the product of this number (136 243) by itself (i.e., 136 243 × 136 243); the square of 136 243 is sometimes called "raising 136 243 to the power 2", or "136 243 squared".
The square of 136 243 is 18 562 155 049 because 136 243 × 136 243 = 136 2432 = 18 562 155 049.
As a consequence, 136 243 is the square root of 18 562 155 049.
The multiples of 136 243 are all integers evenly divisible by 136 243, that is all numbers such that the remainder of the division by 136 243 is zero. There are infinitely many multiples of 136 243. The smallest multiples of 136 243 are: