1999

Names of 1999

• Cardinal: 1999 can be written as One thousand, nine hundred ninety-nine.

Scientific notation

• Scientific notation: 1.999 × 10³

Factors of 1999

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1999

Divisors of 1999

• Number of divisors d(n): 2
• Complete list of divisors:
  1 1999
• Sum of all divisors σ(n): 2000
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1999 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1998

Bases of 1999

• Binary: 11111001111₂
• Hexadecimal: 0x7CF
• Base-36: 1JJ

Squares and roots of 1999

• 1999 squared (1999²) is 3996001
• 1999 cubed (1999³) is 7988005999
• The square root of 1999 is 44.7101778123
• The cube root of 1999 is 12.5971102805

Scales and comparisons

• 1,999 seconds is equal to 33 minutes, 19 seconds.
• To count from 1 to 1,999 would take you about thirty-three minutes.

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 1999 cubic inches would be around 1 feet tall.

Recreational maths with 1999

• 1999 backwards is 9991
• The number of decimal digits it has is: 4
• The sum of 1999's digits is 28
• More coming soon!