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This page will tell you almost everything that it is necessary to know about number: 13
Let's begin with a basic information:

Number 13

Structure

Number 13 has 2 figures which are brought to 4. In English it sounds so: thirteen. Besides, the numbers representing number 13 are: one, three.
Number 13 - decimal number which means that on the basis 10. 13 can be also presented in different bases, such as the Binary system of calculation also looks: 1101, the Octal system of an calculation also, also looks as and 16, in Hexadecimal system of calculation and looks as follows: . 13 The number in the triple system of reference looks like: in fourfold: 31 in pyatirichoy: in shestirichnoy: 21 in the septenary: . Also the number of number systems in from 4 to 34.

Characteristic

Number 13 is Positive and Odd. His inverse number 0,076923076923077 and negative number -13. Number 13 can be divided on 1, 13 without the rest. Besides, it is not an ideal square, and it a prime number. Now let's use trigonometrical functions. By means of sinusoidal function: Sin(13°) gives 0,42, using function of the Cosine of the cos function (13°) gives 0,907 and through the Tangent the tan function(13°) is made by 0,463. Arctangent number is 13 1,494, area of ​​a circle of radius equal to 13 530,929 exponent in powers of 13 is 442413,392.
Previous number: 12
Binary (base two): 1101
Number (base 4): 31
Number (base 6): 21
Number (base 8): 15
Number (base 10): 13
Number (base 12): 11
Number (base 14): d
Number (base 16): d
Number (base 18): d
Number (base 20): d
Number (base 22): d
Number (base 24): d
Number (base 26): d
Number (base 28): d
Number (base 30): d
Number (base 32): d
Number (base 34): d
Inverse: 0,076923076923077
Counter: -13
Divisible by: 1, 13
Factorial number: 6227020800
Number of digits: 2
Sum of digits: 4
Product of digits: 3
13 radian is equal (degree): 744,845
Next number: 14
Number (base 3): 111
Number (base 5): 23
Number (base 7): 16
Number (base 9): 14
Number (base 11): 12
Number (base 13): 10
Number (base 15): d
Number (base 17): d
Number (base 19): d
Number (base 21): d
Number (base 23): d
Number (base 25): d
Number (base 27): d
Number (base 29): d
Number (base 31): d
Number (base 33): d
Even / Odd: Odd
Unix Timestamp: Thu Jan 01 00:00:13 1970
Perfect square: NO
Prime: YES
Positive / Negative: Positive
English: thirteen
English digits: one, three
Sin: 0,42
Cos: 0,907
Tan: 0,463
Atan: 1,494
Area of a circle r= 13: 530,929
exhibitor (degree 13): 442413,392