81279897 is an odd 8-digits composite number following 81279896
and preceding 81279898 . In scientific notation, it is written as 8.1279897 × 10^7.
The sum of its digits is 51. It has a total of 3 prime factors and 8 positive divisors.
There are 54155472 positive integers (up to 81279897) that are relatively prime to 81279897.
81279897 has 8 divisors, whose sum is 108435456
The reverse of 81279897 is 79897218
Previous prime number is 1997
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 51
Digital Root 6
Name
eighty-one million two hundred seventy-nine thousand eight hundred ninety-seven
Scientific notation
8.1279897 × 10^7
Engineering notation
8.1279897 × 10^6
Prime Factorization
3 × 1997 × 13567
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
81279897
Product of the distinct prime numbers
The prime factorization of 81279897 is 3 × 1997 × 13567.
Since it has a total of 3 prime factors.
4 , 8 , 73 , 35 , 185 , 476 , 7058 , 7493 , 50716 , 60903 , 818121 , 811571 , 811758 , 2564097 , 39136843 , 40131133 , 798050978 , 729749496 , 7679751580 , 3709864904
n×2
162559794
n×3
243839691
n×4
325119588
n×5
406399485
n÷2
40639948.5
n÷3
27093299
n÷3
20319974.25
n÷5
16255979.4
n2
6606421656330609
n3
5.3696927176512E+23
n4
4.3644807101234E+31
n5
3.5474454257732E+39
2 √n
9015.5364233084
3 √n
433.17267015698
4 √n
94.95017863758
5 √n
38.194130612269
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
-81279896
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 81279897 can be divided by 8 positive divisors.
The sum of these divisors (counting 81279897) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110110000011101110011001
3
Ternary
12122221110001120
4
Quaternary
10312003232121
5
Quinary
131301424042
6
Senary
12022035453
8
Octal
466035631
10
Decimal
81279897
12
Duodecimal
23278b89
16
Hexadecimal
4d83b99
20
Vigesimal
157jjeh
36
Base36
1ce3yx
md5
0e981821fdf7025ee4e28de838c66a99
sha1
cb543e73ae7a621d59458d9eea23bc5af036abbe
sha256
28520e2e5e5ea9a71d64e25405bdeec169a5876d1111540561a898ccec7796dc
sha512
a330507ea28452eed843c6dd291b4a065403fcd328b49cc2bc4397778bddfb0bc751e2e490afea4c6f0265c1d00179223f09644228048395776462423c47e2ec
ripemd-160
3b110be5d6f201663e701a819fdfdaaaa987d801
Diameter
162559794
Circumference
510696654.59947
Area
2.0754685742045E+16
Volume
2.249251625841E+24
Surface area
8.3018742968179E+16
Circumference
510696654.59947
Perimeter
325119588
Area
6606421656330609
Diagonal
114947132.68569
Surface area
39638529937983654
Volume
5.3696927176512E+23
Space diagonal
140780911.23797
Perimeter
243839691
Area
2.860664491247E+15
Altitude
70390455.618983
Surface area
2.860664491247E+15
Volume
6.3282435558987E+22
Height
38315710.895229