12,837,064

12,837,064 = 2³ x 631 x 2543 (via WolframAlpha)

12,837,064 is the number of decimal digits in the 47th known Mersenne prime, discovered April 12, 2009.

This prime is at present the second largest known prime number, a mere 141,125 digits smaller than the record-breaking Mersenne prime found last August.

Source: Great Internet Mersenne Prime Search

993

993 = 3 x 331


993 is the number of paraffins with 8 carbon atoms.

The fantasy role-playing game Dragon Warriors was set in a fantasy world called "Legend," modeled on medieval Europe in roughly 993 AD.

Source: Wikipedia

892

892 = 2² x 223

892 is the smallest integer ratio of a 13-digit number to its product of digits.

NGC 892 is a galaxy in the constellation Cetus.

Source: What’s Special About This Number?

730

730 = 2 x 5 x 73

730 is 1000001 in base 3 and 1001 in base 9.

730 is the number of connected bipartite graphs with 9 vertices.


In the Urban Dictionary, 730 refers to someone who is crazy.

Source: What’s Special About This Number?

525

525 = 3 x 5² x 7

525 in base 6 is 2233.


Dionysius Exiguus produced his tables for computing the date of Easter in the year 525.

Source: The Positive Integers