It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 700 678 is not a prime number.
For example, 700 678 can be divided by 2: 700 678 / 2 = 350 339.
For 700 678 to be a prime number, it would have been required that 700 678 has only two divisors, i.e., itself and 1.
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700 678 is an even number, because it is evenly divisible by 2: 700 678 / 2 = 350 339.
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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 700 678 is about 837.065.
Thus, the square root of 700 678 is not an integer, and therefore 700 678 is not a square number.
The square of a number (here 700 678) is the result of the product of this number (700 678) by itself (i.e., 700 678 × 700 678); the square of 700 678 is sometimes called "raising 700 678 to the power 2", or "700 678 squared".
The square of 700 678 is 490 949 659 684 because 700 678 × 700 678 = 700 6782 = 490 949 659 684.
As a consequence, 700 678 is the square root of 490 949 659 684.
The multiples of 700 678 are all integers evenly divisible by 700 678, that is all numbers such that the remainder of the division by 700 678 is zero. There are infinitely many multiples of 700 678. The smallest multiples of 700 678 are: