Is 400003 a prime number?

400 003 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 400 003 is about 632.458.

Thus, the square root of 400 003 is not an integer, and therefore 400 003 is not a square number.

The square of a number (here 400 003) is the result of the product of this number (400 003) by itself (i.e., 400 003 × 400 003); the square of 400 003 is sometimes called "raising 400 003 to the power 2", or "400 003 squared".

The square of 400 003 is 160 002 400 009 because 400 003 × 400 003 = 400 003² = 160 002 400 009.

As a consequence, 400 003 is the square root of 160 002 400 009.

400 003 is a number with 6 digits.

The multiples of 400 003 are all integers evenly divisible by 400 003, that is all numbers such that the remainder of the division by 400 003 is zero. There are infinitely many multiples of 400 003. The smallest multiples of 400 003 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 400 003 too, since 0 × 400 003 = 0
• 400 003: indeed, 400 003 is a multiple of itself, since 400 003 is evenly divisible by 400 003 (we have 400 003 / 400 003 = 1, so the remainder of this division is indeed zero)
• 800 006: indeed, 800 006 = 400 003 × 2
• 1 200 009: indeed, 1 200 009 = 400 003 × 3
• 1 600 012: indeed, 1 600 012 = 400 003 × 4
• 2 000 015: indeed, 2 000 015 = 400 003 × 5
• etc.

• Preceding numbers: …400 001, 400 002
• Following numbers: 400 004, 400 005…

Nearest numbers from 400 003

• Preceding prime number: 399 989
• Following prime number: 400 009

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• Est-ce que 400 003 est un nombre premier ?

• ¿400 003 es un número primo?