643 is a prime number. Like all primes (except two), it is an odd number.
Prime factorization of 643:
See below for interesting mathematical facts about the number 643 from the Numbermatics database.
Names of 643
- Cardinal: 643 can be written as Six hundred forty-three.
- Scientific notation: 6.43 × 102
Factors of 643
Divisors of 643
Bases of 643
- Binary: 10100000112
- Hexadecimal: 0x283
- Base-36: HV
Squares and roots of 643
Scales and comparisonsHow big is 643?
- 643 seconds is equal to 10 minutes, 43 seconds.
To count from 1 to 643 would take you about five 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 643 cubic inches would be around 0.7 feet tall.
Recreational maths with 643
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Cite this page
"Number 643 - Facts about the integer". Numbermatics.com. 2022. Web. 29 May 2022.
Numbermatics. (2022). Number 643 - Facts about the integer. Retrieved 29 May 2022, from https://numbermatics.com/n/643/
Numbermatics. 2022. "Number 643 - Facts about the integer". https://numbermatics.com/n/643/
The information we have on file for 643 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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