It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 26 629 is not a prime number.
For example, 26 629 can be divided by 31: 26 629 / 31 = 859.
For 26 629 to be a prime number, it would have been required that 26 629 has only two divisors, i.e., itself and 1.
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26 629 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 26 629 is about 163.184.
Thus, the square root of 26 629 is not an integer, and therefore 26 629 is not a square number.
The square of a number (here 26 629) is the result of the product of this number (26 629) by itself (i.e., 26 629 × 26 629); the square of 26 629 is sometimes called "raising 26 629 to the power 2", or "26 629 squared".
The square of 26 629 is 709 103 641 because 26 629 × 26 629 = 26 6292 = 709 103 641.
As a consequence, 26 629 is the square root of 709 103 641.
The multiples of 26 629 are all integers evenly divisible by 26 629, that is all numbers such that the remainder of the division by 26 629 is zero. There are infinitely many multiples of 26 629. The smallest multiples of 26 629 are: