Everything about 13

Discover a lot of information on the number 13: properties, mathematical operations, how to write it, symbolism, numerology, representations and many other interesting things!


Mathematical operations

Operations and solutions
13*2 = 26 The double of 13 is 26
13*3 = 39 The triple of 13 is 39
13/2 = 6.5 The half of 13 is 6.500000
13/3 = 4.3333333333333 The third of 13 is 4.333333
132 = 169 The square of 13 is 169.000000
133 = 2197 The cube of 13 is 2197.000000
√13 = 3.605551275464 The square root of 13 is 3.605551
log(13) = 2.5649493574615 The natural (Neperian) logarithm of 13 is 2.564949
log10(13) = 1.1139433523068 The decimal logarithm (base 10) of 13 is 1.113943
sin(13) = 0.42016703682664 The sine of 13 is 0.420167
cos(13) = 0.9074467814502 The cosine of 13 is 0.907447
tan(13) = 0.46302113293649 The tangent of 13 is 0.463021


Mathematical representations and links

Other ways to write 13
In letter Thirteen
In roman numeral XIII
In binary 1101
In octal 15
In hexadecimal d
In US dollars USD 13.00 ($)
In euros 13,00 EUR (€)
Some related numbers
Previous number 12
Next number 14
Next prime number 17

How to write / spell 13 in letters?

In letters, the number 13 is written as: Thirteen. And in other languages? how does it spell?

13 in other languages
Write 13 in english Thirteen
Write 13 in french Treize
Write 13 in spanish Trece
Write 13 in portuguese Treze

Mathematical properties of 13

Questions and answers
Is 13 a prime number? Yes
Is 13 a perfect number? No
Number of divisors 2
List of dividers 1, 13
Sum of divisors 14

Some random numbers

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13
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32
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