Is 6991 a prime number?

6 991 is an odd number, because it is not evenly divisible by 2.

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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 6 991 is about 83.612.

Thus, the square root of 6 991 is not an integer, and therefore 6 991 is not a square number.

Anyway, 6 991 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 6 991) is the result of the product of this number (6 991) by itself (i.e., 6 991 × 6 991); the square of 6 991 is sometimes called "raising 6 991 to the power 2", or "6 991 squared".

The square of 6 991 is 48 874 081 because 6 991 × 6 991 = 6 991² = 48 874 081.

As a consequence, 6 991 is the square root of 48 874 081.

6 991 is a number with 4 digits.

The multiples of 6 991 are all integers evenly divisible by 6 991, that is all numbers such that the remainder of the division by 6 991 is zero. There are infinitely many multiples of 6 991. The smallest multiples of 6 991 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 6 991 too, since 0 × 6 991 = 0
• 6 991: indeed, 6 991 is a multiple of itself, since 6 991 is evenly divisible by 6 991 (we have 6 991 / 6 991 = 1, so the remainder of this division is indeed zero)
• 13 982: indeed, 13 982 = 6 991 × 2
• 20 973: indeed, 20 973 = 6 991 × 3
• 27 964: indeed, 27 964 = 6 991 × 4
• 34 955: indeed, 34 955 = 6 991 × 5
• etc.

• Preceding numbers: …6 989, 6 990
• Following numbers: 6 992, 6 993…

Nearest numbers from 6 991

• Preceding prime number: 6 983
• Following prime number: 6 997

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• 6 991 est-il un nombre premier ?