Is 78009 a prime number?

78 009 is an odd number, because it is not evenly divisible by 2.

Find out more:

• 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 78 009 is about 279.301.

Thus, the square root of 78 009 is not an integer, and therefore 78 009 is not a square number.

The square of a number (here 78 009) is the result of the product of this number (78 009) by itself (i.e., 78 009 × 78 009); the square of 78 009 is sometimes called "raising 78 009 to the power 2", or "78 009 squared".

The square of 78 009 is 6 085 404 081 because 78 009 × 78 009 = 78 009² = 6 085 404 081.

As a consequence, 78 009 is the square root of 6 085 404 081.

78 009 is a number with 5 digits.

The multiples of 78 009 are all integers evenly divisible by 78 009, that is all numbers such that the remainder of the division by 78 009 is zero. There are infinitely many multiples of 78 009. The smallest multiples of 78 009 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 78 009 too, since 0 × 78 009 = 0
• 78 009: indeed, 78 009 is a multiple of itself, since 78 009 is evenly divisible by 78 009 (we have 78 009 / 78 009 = 1, so the remainder of this division is indeed zero)
• 156 018: indeed, 156 018 = 78 009 × 2
• 234 027: indeed, 234 027 = 78 009 × 3
• 312 036: indeed, 312 036 = 78 009 × 4
• 390 045: indeed, 390 045 = 78 009 × 5
• etc.

• Preceding numbers: …78 007, 78 008
• Following numbers: 78 010, 78 011…

Nearest numbers from 78 009

• Preceding prime number: 78 007
• Following prime number: 78 017

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• 78 009 est-il un nombre premier ?