Complete Number Analysis
13
It's a prime number!
It's a Fibonacci number! (Position: 7)
It's a happy number!
Number Visualizations
Binary Visual
1101
3 ones, 1 zeros
Mathematical Properties
Basic Properties
Parity:
Odd
Prime:
Yes
Square:
169
Cube:
2,197
Square root:
3.6056
Cube root:
2.3513
Factorial:
6,227,020,800
Divisors and Factors
Prime factors:
13
Number of divisors:
2
Sum of divisors:
1
Type:
Deficient
Divisors:
1, 13
Conversions
Binary:
1101
Octal:
15
Hexadecimal:
D
Roman:
XIII
Base64:
MTM=
Geometry and Measures
Circle (radius 13)
Area:
530.93 u²
Perimeter:
81.68 u
Diameter:
26 u
Square (side 13)
Area:
169 u²
Perimeter:
52 u
Diagonal:
18.38 u
3D Volumes
Cubo:
2,197 u³
Sphere:
9,202.77 u³
Cylinder:
6,902.08 u³
More Measures
Eq. triangle:
73.18 u²
Hexagon:
439.07 u²
Cube surf.:
1,014 u²
Numerology and Symbolism
Numerological Analysis
Sum of digits:
4
Numerological reduction:
4
Product of digits:
3
Unique Digits:
2
Meanings:
Stability
Work
Order
Number Curiosities
General fact: 13 is the number of colonies that formed the United States.
Mathematical fact: 13 is the number of Archimedian solids.
Trivia: 13 is the number of loaves in a "baker's dozen".
Historical date: January 13th is the day in 1953 that Marshal Josip Broz Tito is chosen as President of Yugoslavia.
More Interesting Properties
In the calendar
Day of the year:
13 January
Weeks:
1.9 weeks
Months:
0.4 months
Years:
0.04 years
In time
Seconds:
00:00:13
Minutes:
0.22 min
Hours:
0 h
Days:
0 days
Representations
Percentage:
13%
Angle:
13°
Temperature:
13°C = 55.4°F
Frequency:
13 Hz
Games
Dice (d6):
2 dados + 1
Chess:
e2
Cards:
K♠
Programmatically generated for number 13
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