Is 18123 a prime number?

18 123 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 18 123 is about 134.622.

Thus, the square root of 18 123 is not an integer, and therefore 18 123 is not a square number.

The square of a number (here 18 123) is the result of the product of this number (18 123) by itself (i.e., 18 123 × 18 123); the square of 18 123 is sometimes called "raising 18 123 to the power 2", or "18 123 squared".

The square of 18 123 is 328 443 129 because 18 123 × 18 123 = 18 123² = 328 443 129.

As a consequence, 18 123 is the square root of 328 443 129.

18 123 is a number with 5 digits.

The multiples of 18 123 are all integers evenly divisible by 18 123, that is all numbers such that the remainder of the division by 18 123 is zero. There are infinitely many multiples of 18 123. The smallest multiples of 18 123 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 18 123 too, since 0 × 18 123 = 0
• 18 123: indeed, 18 123 is a multiple of itself, since 18 123 is evenly divisible by 18 123 (we have 18 123 / 18 123 = 1, so the remainder of this division is indeed zero)
• 36 246: indeed, 36 246 = 18 123 × 2
• 54 369: indeed, 54 369 = 18 123 × 3
• 72 492: indeed, 72 492 = 18 123 × 4
• 90 615: indeed, 90 615 = 18 123 × 5
• etc.

• Preceding numbers: …18 121, 18 122
• Following numbers: 18 124, 18 125…

Nearest numbers from 18 123

• Preceding prime number: 18 121
• Following prime number: 18 127

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• 18 123 est-il un nombre premier ?