89

Names of 89

• Cardinal: 89 can be written as Eighty-nine.

Scientific notation

• Scientific notation: 8.9 × 10¹

Factors of 89

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 89

Divisors of 89

• Number of divisors d(n): 2
• Complete list of divisors:
  1 89
• Sum of all divisors σ(n): 90
• Sum of proper divisors (its aliquot sum) s(n): 1
• 89 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 88

Bases of 89

• Binary: 1011001₂
• Hexadecimal: 0x59
• Base-36: 2H

Squares and roots of 89

• 89 squared (89²) is 7921
• 89 cubed (89³) is 704969
• The square root of 89 is 9.4339811321
• The cube root of 89 is 4.4647450955

Scales and comparisons

• 89 seconds is equal to 1 minute, 29 seconds.
• To count from 1 to 89 would take you about forty-four seconds.

  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 89 cubic inches would be around 0.4 feet tall.

Recreational maths with 89

• 89 backwards is 98
• The number of decimal digits it has is: 2
• The sum of 89's digits is 17
• More coming soon!