This BAB was created as a result of GDT working on a BAB for Google's 9th birthday.

9 is a digit that is also the largest decimal digit 9 is a counting number that is also an integer 9 is odd 9 is not prime 9 is a square number; sqrt(9) = 3 9 sided polygons are called nonagons (technically enneagon) 9 in base-2 (binary) is 1001 9 in base-8 (octal) is 11 9 in base-3 (ternary) is 100 9 in base-9 (novenary) is 10 9 in base-16 (hexadecimal) is 9 9 in as a Roman Numeral is IX 9 is an exponential factorial (3^2^1) 10^9 is one billion (giga-) 10^-9 is one billionth (nano-)Google's birthday occurs in September (the 9th month) on the 27th (9 x sqrt(9)). Google turned 9 in 2007 and 9 is a factor of 2007. In fact, the prime factors of 2007 are sqrt(9), sqrt(9) and 223.

`[Wikipedia]`

"If you multiply nine by any whole number (except zero), and repeatedly add the digits of the answer until it's just one digit, you will end up with nine." Try it!## RoadHacker Nanofoo

Arkansas has a "town" named Number Nine and it is home to the Number Nine Baptist Church.

Arkansas has a road sign that is 9 miles from AR-Hwy-1. The three numbers in the sign are 1, 8 and 9. Last year (02006) Google was nine minus one years young (i.e. eight).

`[ZeroPoints opportunity]`

There is no BAB for the number eight. Create a BAB for the number eight and zero points will be awarded. Another zero points can be earned if a BAB is created for the number sqrt(9).## Update::2009.06.23

From Whitehouse.gov on 23 June 2009... "Today the White House will be holding a roundtable on the 37th Anniversary of Title IX." And

`in Roman numeral is`

9`.`

IXThe MBNA had undergone numerous modifications since this nBAB was created; therefore, the it was re-executed for the number

`.`

9MathBabbler Number Analyst (MBNA) output: ========================================= 9 is a natural, whole, integer 9 is odd 9 proper divisors are: 1,3, 9 is refactorable (evenly divisable by # of divisors) 9 is deficient (sum of divisors is 4) 9 is unhappy 9 is a Harshad number 9 is not prime 9 has the prime factors: 3*3 (sum=6) 9 is semiprime (biprime or 2-almost prime) 9 sum of prime factors is: 6 9 is undulating 9 and 8 are a Ruth-Aaron pair 9 is palindromic 9 is repdigit in base-10 9 is a Padovan number(5+4) 9 is a lucky number 9 in octal is 011 9 in hexadecimal is 0x9 9 in binary is 1001 (is evil) 9 nearest square numbers: 9 is square (9 is square) sqrt(9) = 3 ln(9) = 2.19722 log(9) = 0.954243 9 is 3^2 9 reciprocal is .11111111111111111111111111111111 9! is 362880 9 is 2.86479 Pi years 9 is 0 score and 9 years 9 written as a Roman numeral is IX

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 16 September 2007

This work is licensed under a Creative Commons Attribution 3.0 United States License.