What is the number pi?

One Million Digits of Pi. 3.14 Pi digits The first 10 digits of pi (π) are 3.1415926535. The first million digits of pi (π) are below, got a good memory? then try to recite as many digits as you can in our quiz or our memory card game! enjoy! 3. read more

The number π (/ p aɪ /) is a mathematical constant. Originally defined as the ratio of a circle's circumference to its diameter, it now has various equivalent definitions and appears in many formulas in all areas of mathematics and physics. It is approximately equal to 3.14159. read more

Pi is an irrational number, which means that it is a real number with nonrepeating decimal expansion. It cannot be represented by an integer ratio and goes on forever, otherwise known as an infinite decimal. read more