Home » NUMBERS » 9

PNG images: 9

9 (nine) is the natural number following 8 and preceding 10.

9 is a composite number, its proper divisors being 1 and 3. It is 3 times 3 and hence the third square number. Nine is a Motzkin number. It is the first composite lucky number, along with the first composite odd number and only single-digit composite odd number.

9 is the only positive perfect power that is one more than another positive perfect power, by Mih─âilescu's Theorem.

9 is the highest single-digit number in the decimal system. It is the second non-unitary square prime of the form (p2) and the first that is odd. All subsequent squares of this form are odd.

Since 9 = 321, 9 is an exponential factorial.

A polygon with nine sides is called a nonagon or enneagon. A group of nine of anything is called an ennead.

In this page you can download free PNG images: Number 9 PNG images free download, 9 PNG

In this gallery "9" we have 48 free PNG images with transparent background.

9 PNG images for free download: