491 is an odd 3-digits prime number following 490
and preceding 492 . In scientific notation, it is written as 4.91 × 10^2.
The sum of its digits is 14. It has a total of 1 prime factors and 2 positive divisors.
There are 490 positive integers (up to 491) that are relatively prime to 491.
491 has 2 divisors, whose sum is 492
The reverse of 491 is 194
Previous prime number is 1
Is Prime? yes
Number parity odd
Number length 3
Sum of Digits 14
Digital Root 5
Name
four hundred ninety-one
Scientific notation
4.91 × 10^2
Engineering notation
4.91 × 10^0
Prime Factorization
491
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
491
Product of the distinct prime numbers
The prime factorization of 491 is 491.
Since it has a total of 1 prime factors.
7 , 2 , 6 , 83 , 982 , 293 , 6452 , 4245 , 20667 , 21031 , 942214 , 263467 , 8719002 , 6839602 , 16315994 , 57454990 , 968849426 , 946173188 , 3247607221 , 189678845
n×2
982
n×3
1473
n×4
1964
n×5
2455
n÷2
245.5
n÷3
163.66666666667
n÷3
122.75
n÷5
98.2
n2
241081
n3
118370771
n4
58120048561
n5
28536943843451
2 √n
22.15851980616
3 √n
7.8890946040238
4 √n
4.707283697225
5 √n
3.4531567944523
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
492
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
246
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
22.181073012819
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9959349593496
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 491 can be divided by 2 positive divisors.
The sum of these divisors (counting 491) is 492, the average is 246.
Base
System
Value
2
Binary
111101011
3
Ternary
200012
4
Quaternary
13223
5
Quinary
3431
6
Senary
2135
8
Octal
753
10
Decimal
491
12
Duodecimal
34b
16
Hexadecimal
1eb
20
Vigesimal
14b
36
Base36
dn
md5
559cb990c9dffd8675f6bc2186971dc2
sha1
014a1aa3f7a2c6578a3fa48e3dd84f775925489f
sha256
227445a988500528d7826c6921d2e3b4a79ccf3a94cc3bcf7b667e3ae4990b36
sha512
cd0ab9232bf0df83b5ca6e40b1600c66e84fc513736381d6dda23664d1af5ba3626c8a5ea4b06d72bb42c782c5cd9c4049b2364cc6e3de4a9ba9bc2f45d7bbd5
ripemd-160
6e63d211df47b1b909fb46d5415570ee0349dcc9
Diameter
982
Circumference
3085.0439858252
Area
757378.29852008
Volume
495830326.09781
Surface area
3029513.1940803
Circumference
3085.0439858252
Perimeter
1964
Area
241081
Diagonal
694.37885912519
Surface area
1446486
Volume
118370771
Space diagonal
850.43694651632
Perimeter
1473
Area
104391.13518488
Altitude
425.21847325816
Surface area
104391.13518488
Volume
13950129.14473
Height
231.4596197084