47
47 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.
47 is a prime number. Like all primes (except two), it is an odd number.
Prime factorization of 47:
47
See below for interesting mathematical facts about the number 47 from the Numbermatics database.
Names of 47
 Cardinal: 47 can be written as Fortyseven.
Scientific notation
 Scientific notation: 4.7 × 10^{1}
Factors of 47
 Number of distinct prime factors ω(n): 1
 Total number of prime factors Ω(n): 1
 Sum of prime factors: 47
Divisors of 47
 Number of divisors d(n): 2
 Complete list of divisors:
 Sum of all divisors σ(n): 48
 Sum of proper divisors (its aliquot sum) s(n): 1
 47 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 46
Bases of 47
 Binary: 101111 _{2}
 Hexadecimal: 0x2f
Squares and roots of 47
 47 squared (47^{2}) is 2209
 47 cubed (47^{3}) is 103823

The
square root of 47 is 6.8556546005 
The
cube root of 47 is 3.6088260801
Scales and comparisons
How big is 47?
To count from 1 to 47 would take you about twentythree 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 randomlychosen 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.
Note: we do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!
 A cube with a volume of 47 cubic inches would be around 0.3 feet tall.
Recreational maths with 47
 47 backwards is 74
 The number of decimal digits it has is: 2
 The sum of 47's digits is 11
 More coming soon!
The information we have on file for 47 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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