81743989 is an odd 8-digits composite number following 81743988
and preceding 81743990 . In scientific notation, it is written as 8.1743989 × 10^7.
The sum of its digits is 49. It has a total of 3 prime factors and 8 positive divisors.
There are 76991040 positive integers (up to 81743989) that are relatively prime to 81743989.
81743989 has 8 divisors, whose sum is 82529280
The reverse of 81743989 is 98934718
Previous prime number is 191
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 49
Digital Root 4
Name
eighty-one million seven hundred forty-three thousand nine hundred eighty-nine
Scientific notation
8.1743989 × 10^7
Engineering notation
8.1743989 × 10^6
Prime Factorization
1591 × 191 × 269
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
81743989
Product of the distinct prime numbers
The prime factorization of 81743989 is 1591 × 191 × 269.
Since it has a total of 3 prime factors.
4 , 7 , 32 , 81 , 587 , 360 , 4374 , 6649 , 40773 , 98068 , 760260 , 540615 , 3373221 , 4292295 , 25377400 , 33739224 , 611719600 , 582914180 , 5004479928 , 468037784
n×2
163487978
n×3
245231967
n×4
326975956
n×5
408719945
n÷2
40871994.5
n÷3
27247996.333333
n÷3
20435997.25
n÷5
16348797.8
n2
6682079737632121
n3
5.4621985257012E+23
n4
4.4650189620074E+31
n5
3.6498846091512E+39
2 √n
9041.2382448424
3 √n
433.99554916259
4 √n
95.085426038076
5 √n
38.237647509862
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
-81743988
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 81743989 can be divided by 8 positive divisors.
The sum of these divisors (counting 81743989) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110111110101000001110101
3
Ternary
12200211000200011
4
Quaternary
10313311001311
5
Quinary
131411301424
6
Senary
12040020221
8
Octal
467650165
10
Decimal
81743989
12
Duodecimal
23461671
16
Hexadecimal
4df5075
20
Vigesimal
15ahjj9
36
Base36
1co22d
md5
c58e140494539e1d8325d40d8de833a9
sha1
3c247b4672885fa89c5b64df8b80b2a8d35f45f5
sha256
54b4ad2fc0668a65b3b6882f628277ef4656f2a6d8792f01a5701ebc480cd2e3
sha512
e3589bcba8b1f4b8f20d91775a550cfb0d8a868c23d247970aa624d1ca103db7f23c4b6405a350fff79549761decb8511f3a2fe4ded8439569680a58e63d233e
ripemd-160
12f1fa8f7b4ec99a39d3a51a1e3befbe12f8e40a
Diameter
163487978
Circumference
513612630.63505
Area
2.0992372614446E+16
Volume
2.2880003681056E+24
Surface area
8.3969490457785E+16
Circumference
513612630.63505
Perimeter
326975956
Area
6682079737632121
Diagonal
115603457.88628
Surface area
40092478425792726
Volume
5.4621985257012E+23
Space diagonal
141584742.16135
Perimeter
245231967
Area
2.8934254014513E+15
Altitude
70792371.080676
Surface area
2.8934254014513E+15
Volume
6.4372626961842E+22
Height
38534485.962092