It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 320 429 is not a prime number.
For example, 320 429 can be divided by 59: 320 429 / 59 = 5 431.
For 320 429 to be a prime number, it would have been required that 320 429 has only two divisors, i.e., itself and 1.
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320 429 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 320 429 is about 566.064.
Thus, the square root of 320 429 is not an integer, and therefore 320 429 is not a square number.
The square of a number (here 320 429) is the result of the product of this number (320 429) by itself (i.e., 320 429 × 320 429); the square of 320 429 is sometimes called "raising 320 429 to the power 2", or "320 429 squared".
The square of 320 429 is 102 674 744 041 because 320 429 × 320 429 = 320 4292 = 102 674 744 041.
As a consequence, 320 429 is the square root of 102 674 744 041.
The multiples of 320 429 are all integers evenly divisible by 320 429, that is all numbers such that the remainder of the division by 320 429 is zero. There are infinitely many multiples of 320 429. The smallest multiples of 320 429 are: