Ninety nine

The ninety-nine (99) is the natural number that follows ninety-eight and precedes one hundred.

Mathematical properties

• It is a composite number, which has the following factors: 1, 3, 9, 11 and 33. As the sum of its factors is 57 ≤99, it is a defective number.

Features

• 99 is the atomic number of einstenio.
• In the gambling receives the nickname of the agony.
• The 99 in the city of L'Aquila, in Italy; its history tells that the number 99 is intimately linked to this medieval city: 99 castles, 99 churches, 99 squares, 99 fountains and 99 touches on the bell of the cathedral every afternoon.