Is 9978 a prime number?

9 978 is an even number, because it is evenly divisible by 2: 9 978 / 2 = 4 989.

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• What is an even number?

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 9 978 is about 99.890.

Thus, the square root of 9 978 is not an integer, and therefore 9 978 is not a square number.

The square of a number (here 9 978) is the result of the product of this number (9 978) by itself (i.e., 9 978 × 9 978); the square of 9 978 is sometimes called "raising 9 978 to the power 2", or "9 978 squared".

The square of 9 978 is 99 560 484 because 9 978 × 9 978 = 9 978² = 99 560 484.

As a consequence, 9 978 is the square root of 99 560 484.

9 978 is a number with 4 digits.

The multiples of 9 978 are all integers evenly divisible by 9 978, that is all numbers such that the remainder of the division by 9 978 is zero. There are infinitely many multiples of 9 978. The smallest multiples of 9 978 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 9 978 too, since 0 × 9 978 = 0
• 9 978: indeed, 9 978 is a multiple of itself, since 9 978 is evenly divisible by 9 978 (we have 9 978 / 9 978 = 1, so the remainder of this division is indeed zero)
• 19 956: indeed, 19 956 = 9 978 × 2
• 29 934: indeed, 29 934 = 9 978 × 3
• 39 912: indeed, 39 912 = 9 978 × 4
• 49 890: indeed, 49 890 = 9 978 × 5
• etc.

• Preceding numbers: …9 976, 9 977
• Following numbers: 9 979, 9 980…

Nearest numbers from 9 978

• Preceding prime number: 9 973
• Following prime number: 10 007

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• 9 978 est-il un nombre premier ?