209 is an odd 3-digits composite number following 208
and preceding 210 . In scientific notation, it is written as 2.09 × 10^2.
The sum of its digits is 11. It has a total of 2 prime factors and 4 positive divisors.
There are 180 positive integers (up to 209) that are relatively prime to 209.
209 has 4 divisors, whose sum is 240
The reverse of 209 is 902
Previous prime number is 19
Is Prime? no
Number parity odd
Number length 3
Sum of Digits 11
Digital Root 2
Scientific notation
2.09 × 10^2
Engineering notation
2.09 × 10^0
Prime Factorization
19 × 11
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
209
Product of the distinct prime numbers
The prime factorization of 209 is 19 × 11.
Since it has a total of 2 prime factors.
2 , 4 , 89 , 24 , 643 , 343 , 3459 , 2169 , 18559 , 23211 , 279125 , 47574 , 6388069 , 58182 , 61301184 , 35769866 , 765708583 , 72466008 , 3094380780 , 8075698833
n×2
418
n×3
627
n×4
836
n×5
1045
n÷2
104.5
n÷3
69.666666666667
n÷3
52.25
n÷5
41.8
n2
43681
n3
9129329
n4
1908029761
n5
398778220049
2 √n
14.456832294801
3 √n
5.9344721403999
4 √n
3.8022141305825
5 √n
2.9109132116612
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-208
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
1
Returns the nth root of the product of n divisors
H
Harmonic Mean
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 209 can be divided by 4 positive divisors.
The sum of these divisors (counting 209) is 1, the average is 0.25.
Base
System
Value
2
Binary
11010001
3
Ternary
21202
4
Quaternary
3101
5
Quinary
1314
6
Senary
545
8
Octal
321
10
Decimal
209
12
Duodecimal
155
16
Hexadecimal
d1
20
Vigesimal
a9
36
Base36
5t
md5
b1d10e7bafa4421218a51b1e1f1b0ba2
sha1
acfdd18ea7f4a2ba74132ba977dc207204142994
sha256
83f814f7a92e365cbd79f9addceed185761a8d38a06a2d4350bb1fe4b7632b34
sha512
c2bef5a46abc8a9f3c1447a2a168baf34f2770084be0d9a03546540f117360c6faf35d80a4922fea09cb69c418ad08439bcb3fa6bf09a9e570bc2b1912b2906d
ripemd-160
355d4c14dd3e34e697910573e66e2fac44d77888
Diameter
418
Circumference
1313.1857292005
Area
137227.90870146
Volume
38240843.891472
Surface area
548911.63480582
Circumference
1313.1857292005
Perimeter
836
Area
43681
Diagonal
295.57063453598
Surface area
262086
Volume
9129329
Space diagonal
361.9986187819
Perimeter
627
Area
18914.427831354
Altitude
180.99930939095
Surface area
18914.427831354
Volume
1075901.7405972
Height
98.523544845326