It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 237 991 is not a prime number.
For example, 237 991 can be divided by 13: 237 991 / 13 = 18 307.
For 237 991 to be a prime number, it would have been required that 237 991 has only two divisors, i.e., itself and 1.
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237 991 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 237 991 is about 487.843.
Thus, the square root of 237 991 is not an integer, and therefore 237 991 is not a square number.
The square of a number (here 237 991) is the result of the product of this number (237 991) by itself (i.e., 237 991 × 237 991); the square of 237 991 is sometimes called "raising 237 991 to the power 2", or "237 991 squared".
The square of 237 991 is 56 639 716 081 because 237 991 × 237 991 = 237 9912 = 56 639 716 081.
As a consequence, 237 991 is the square root of 56 639 716 081.
The multiples of 237 991 are all integers evenly divisible by 237 991, that is all numbers such that the remainder of the division by 237 991 is zero. There are infinitely many multiples of 237 991. The smallest multiples of 237 991 are: