2008 2010

The Number 2009: Properties and Meanings

Prime Factors of 2009=7x7x41.

2009 can be expressed as the sum of 4 positive cubes in exactly 3 ways.

Both 2009 and its reversal 9002 are multiples of 7.

The 2009th prime (17471) is palindromic.

The Year 2009 AD

The year 2009 AD is The International Year of Astronomy (IYA2009) a year-long celebration of astronomy, coinciding with the 400th anniversary of the first recorded astronomical observations with a telescope by Galileo Galilei and the publication of Johannes Kepler's Astronomia nova.

The United Nations General Assembly declared 2009 as the International Year of Natural Fibres.

2008 2010