It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 620 142 008 is not a prime number.
For example, 620 142 008 can be divided by 2: 620 142 008 / 2 = 310 071 004.
For 620 142 008 to be a prime number, it would have been required that 620 142 008 has only two divisors, i.e., itself and 1.
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620 142 008 is an even number, because it is evenly divisible by 2: 620 142 008 / 2 = 310 071 004.
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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 620 142 008 is about 24 902.651.
Thus, the square root of 620 142 008 is not an integer, and therefore 620 142 008 is not a square number.
The square of a number (here 620 142 008) is the result of the product of this number (620 142 008) by itself (i.e., 620 142 008 × 620 142 008); the square of 620 142 008 is sometimes called "raising 620 142 008 to the power 2", or "620 142 008 squared".
The square of 620 142 008 is 384 576 110 086 272 064 because 620 142 008 × 620 142 008 = 620 142 0082 = 384 576 110 086 272 064.
As a consequence, 620 142 008 is the square root of 384 576 110 086 272 064.
620 142 008 is a number with 9 digits.
The multiples of 620 142 008 are all integers evenly divisible by 620 142 008, that is all numbers such that the remainder of the division by 620 142 008 is zero. There are infinitely many multiples of 620 142 008. The smallest multiples of 620 142 008 are: