1991239909 is an odd 10-digits composite number following 1991239908
and preceding 1991239910 . In scientific notation, it is written as 1.991239909 × 10^9.
The sum of its digits is 52. It has a total of 2 prime factors and 4 positive divisors.
There are 1987664416 positive integers (up to 1991239909) that are relatively prime to 1991239909.
1991239909 has 4 divisors, whose sum is 1994815404
The reverse of 1991239909 is 9099321991
Previous prime number is 557
Is Prime? no Number parity odd Number length 10 Sum of Digits 52 Digital Root 7
Name
one billion nine hundred ninety-one million two hundred thirty-nine thousand nine hundred nine
Scientific notation
1.991239909 × 10^9
Engineering notation
1.991239909 × 10^9
Prime Factorization
557 × 3574937
Composite number
ω Distinct Factors
2 Total number of distinct prime factors
Ω Total Factors
2 Total number of prime factors
rad Radical
1991239909 Product of the distinct prime numbers
The prime factorization of 1991239909 is 557 × 3574937.
Since it has a total of 2 prime factors.
9 , 1 , 22 , 29 , 336 , 627 , 9108 , 919 , 51409 , 70668 , 327215 , 323631 , 4281996 , 165339 , 10246655 , 46989216 , 189576005 , 388158113 , 6794612112 , 4799463315
n×2
3982479818
n×3
5973719727
n×4
7964959636
n×5
9956199545
n÷2
995619954.5
n÷3
663746636.33333
n÷3
497809977.25
n÷5
398247981.8
n2
3965036375194328281
n3
7.8953386709236E+27
n4
1.5721513456614E+37
n5
3.1305305024691E+46
2 √n44623.311273369
3 √n1258.0788537953
4 √n211.24230464888
5 √n72.414363478431
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
-1991239908 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 1991239909 can be divided by 4 positive divisors.
The sum of these divisors (counting 1991239909) is 1, the average is 0.25.
Base
System
Value
2
Binary
1110110101011111110100011100101
3
Ternary
12010202212110122021
4
Quaternary
1312223332203211
5
Quinary
13034224134114
6
Senary
525331103141
8
Octal
16653764345
10
Decimal
1991239909
12
Duodecimal
476a41ab1
16
Hexadecimal
76afe8e5
20
Vigesimal
1b254jf9
36
Base36
wxj6jp
md5
92536c8a73d9d86a3ddc3a93c8e69090
sha1
bac6290cc881de645e3596278786199083d2ddf1
sha256
23e20a15c0f9ccb0f24516976d18a1252fb64e12beb0fe790272683eae12af11
sha512
16d857d8576a17eb7e9711c18e400a69373928620c28eaf7fe26f8bb08e13218221dbc042c7de34f10b049a0b0688da2eab0dc08c5be01a9cbd253a2a523a436
ripemd-160
7bd8954af361425621a793b9c5b7d6559383d68e
Diameter
3982479818
Circumference
12511329339.298
Area
1.2456529147527E+19
Volume
3.3071917288236E+28
Surface area
4.9826116590107E+19
Circumference
12511329339.298
Perimeter
7964959636
Area
3965036375194328281
Diagonal
2816038485.2464
Surface area
2.3790218251166E+19
Volume
7.8953386709236E+27
Space diagonal
3448928692.4468
Perimeter
5973719727
Area
1.7169111139238E+18
Altitude
1724464346.2234
Surface area
1.7169111139238E+18
Volume
9.3047458566242E+26
Height
938679495.08212