9 (number)
= 9 (number)
{wiki=9_(number)}
The number 9 is a natural number that follows 8 and precedes 10. It is an integer and is classified as an odd number. In mathematics, 9 is significant in various ways: 1. **Mathematics**: - It is the square of 3 (3 x 3 = 9). - It is also the highest single-digit number in the decimal system.