89 (عدد)

← 88 89 90 →
كميخطأ: الوظيفة "numeral_to_arabic" غير موجودة.
ترتيبي89
(خطأ: الوظيفة "numeral_to_arabic" غير موجودة.)
التحليل لعواملprime
أولي24th
القواسم1, 89
العدد اليونانيΠΘ´
العدد الرومانيLXXXIX
ثنائي10110012
ثلاثي100223
رباعي11214
خماسي3245
سداسي2256
ثماني1318
اثنا عشري7512
ستة عشري5916
عشريني4920
أساس 362H36

89 (eighty-nine) is the natural number following 88 and preceding 90.

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In mathematics

89 is:

  • a Markov number, appearing in solutions to the Markov Diophantine equation with other odd-indexed Fibonacci numbers.

M89 is the 10th Mersenne prime.

Although 89 is not a Lychrel number in base 10, it is unusual that it takes 24 iterations of the reverse and add process to reach a palindrome. Among the known non-Lychrel numbers in the first 10000 integers, no other number requires that many or more iterations. The palindrome reached is also unusually large: 8813200023188.[4]

There are exactly 1000 prime numbers between 1 and 892=7921. [5]


In science

Eighty-nine is:

In astronomy

In sports

In other fields

Eighty-nine is also:

See also

References

  1. ^ "Sloane's A109611 : Chen primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  2. ^ "Sloane's A002144 : Pythagorean primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  3. ^ "Sloane's A005478 : Prime Fibonacci numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  4. ^ Weisstein, Eric W. "196-Algorithm." From MathWorld, a Wolfram Web Resource. http://mathworld.wolfram.com/196-Algorithm.html
  5. ^ "Prime Curios! 89". primes.utm.edu. Retrieved 2022-12-19.
  6. ^ "NASA/IPAC Extragalactic Database". Results for NGC 4552. Retrieved 2006-10-24.
  7. ^ "Interstate 89". Interstate Guide. Retrieved December 3, 2018.
  8. ^ "What Does China Censor Online?". www.informationisbeautiful.net. Retrieved 28 May 2015.