Is 991009 a prime number?

991 009 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 991 009 is about 995.494.

Thus, the square root of 991 009 is not an integer, and therefore 991 009 is not a square number.

Anyway, 991 009 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 991 009) is the result of the product of this number (991 009) by itself (i.e., 991 009 × 991 009); the square of 991 009 is sometimes called "raising 991 009 to the power 2", or "991 009 squared".

The square of 991 009 is 982 098 838 081 because 991 009 × 991 009 = 991 009² = 982 098 838 081.

As a consequence, 991 009 is the square root of 982 098 838 081.

991 009 is a number with 6 digits.

The multiples of 991 009 are all integers evenly divisible by 991 009, that is all numbers such that the remainder of the division by 991 009 is zero. There are infinitely many multiples of 991 009. The smallest multiples of 991 009 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 991 009 too, since 0 × 991 009 = 0
• 991 009: indeed, 991 009 is a multiple of itself, since 991 009 is evenly divisible by 991 009 (we have 991 009 / 991 009 = 1, so the remainder of this division is indeed zero)
• 1 982 018: indeed, 1 982 018 = 991 009 × 2
• 2 973 027: indeed, 2 973 027 = 991 009 × 3
• 3 964 036: indeed, 3 964 036 = 991 009 × 4
• 4 955 045: indeed, 4 955 045 = 991 009 × 5
• etc.

• Preceding numbers: …991 007, 991 008
• Following numbers: 991 010, 991 011…

Nearest numbers from 991 009

• Preceding prime number: 990 989
• Following prime number: 991 027

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• 991 009 est-il un nombre premier ?