1981721749 is an odd 10-digits composite number following 1981721748
and preceding 1981721750 . In scientific notation, it is written as 1.981721749 × 10^9.
The sum of its digits is 49. It has a total of 3 prime factors and 8 positive divisors.
There are 1686392568 positive integers (up to 1981721749) that are relatively prime to 1981721749.
1981721749 has 8 divisors, whose sum is 2036720000
The reverse of 1981721749 is 9471271891
Previous prime number is 139
Is Prime? no
Number parity odd
Number length 10
Sum of Digits 49
Digital Root 4
Name
one billion nine hundred eighty-one million seven hundred twenty-one thousand seven hundred forty-nine
Scientific notation
1.981721749 × 10^9
Engineering notation
1.981721749 × 10^9
Prime Factorization
49 × 139 × 290959
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
1981721749
Product of the distinct prime numbers
The prime factorization of 1981721749 is 49 × 139 × 290959.
Since it has a total of 3 prime factors.
8 , 1 , 51 , 22 , 705 , 253 , 8396 , 2374 , 73351 , 51246 , 953189 , 157602 , 9585770 , 9226673 , 46588904 , 18488194 , 112841327 , 253685017 , 7328775097 , 9236410918
n×2
3963443498
n×3
5945165247
n×4
7926886996
n×5
9908608745
n÷2
990860874.5
n÷3
660573916.33333
n÷3
495430437.25
n÷5
396344349.8
n2
3927221090459619001
n3
7.7826594480953E+27
n4
1.5423065493351E+37
n5
3.0564224324425E+46
2 √n
44516.53343422
3 √n
1256.0711053924
4 √n
210.98941545542
5 √n
72.345002359207
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-1981721748
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 1981721749 can be divided by 8 positive divisors.
The sum of these divisors (counting 1981721749) is 1, the average is 0.125.
Base
System
Value
2
Binary
1110110000111101010110010010101
3
Ternary
12010002221220011211
4
Quaternary
1312013222302111
5
Quinary
13024310043444
6
Senary
524351101421
8
Octal
16607526225
10
Decimal
1981721749
12
Duodecimal
473811871
16
Hexadecimal
761eac95
20
Vigesimal
1aj5f479
36
Base36
wrv6ad
md5
b61017ba7cc4a812ae337f7aeee56f94
sha1
423592c100a6b24ee8e513d19fbd319c528a31ed
sha256
3c2fac75ef2ab99cd2a5d7ea77b02a7ee06e85a7dbe211e107a49696e8abb170
sha512
bca45e996d2d26f77013f0b041365c34bc0be0db0dfc09ad685e0228b7486a30bdb979a69011353b71b3c1456a96778e30a24bdf9245c41513310d8ddb2750db
ripemd-160
7a194f1aa543c056bc772fb248a1253137ca7fb8
Diameter
3963443498
Circumference
12451524976.235
Area
1.2337728926811E+19
Volume
3.259992766337E+28
Surface area
4.9350915707243E+19
Circumference
12451524976.235
Perimeter
7926886996
Area
3927221090459619001
Diagonal
2802577774.2855
Surface area
2.3563326542758E+19
Volume
7.7826594480953E+27
Space diagonal
3432442755.7323
Perimeter
5945165247
Area
1.700536615308E+18
Altitude
1716221377.8661
Surface area
1.700536615308E+18
Volume
9.1719521190229E+26
Height
934192591.42851