81489787 is an odd 8-digits prime number following 81489786
and preceding 81489788 . In scientific notation, it is written as 8.1489787 × 10^7.
The sum of its digits is 52. It has a total of 1 prime factors and 2 positive divisors.
There are 81489786 positive integers (up to 81489787) that are relatively prime to 81489787.
81489787 has 2 divisors, whose sum is 81489788
The reverse of 81489787 is 78798418
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 52 Digital Root 7
Name
eighty-one million four hundred eighty-nine thousand seven hundred eighty-seven
Scientific notation
8.1489787 × 10^7
Engineering notation
8.1489787 × 10^6
Prime Factorization
81489787
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81489787 Product of the distinct prime numbers
The prime factorization of 81489787 is 81489787.
Since it has a total of 1 prime factors.
10 , 9 , 77 , 53 , 789 , 934 , 3740 , 392 , 65300 , 13506 , 447716 , 997209 , 7803631 , 6961094 , 40497056 , 71823949 , 427785551 , 309075270 , 5993447589 , 4064142110
n×2
162979574
n×3
244469361
n×4
325959148
n×5
407448935
n÷2
40744893.5
n÷3
27163262.333333
n÷3
20372446.75
n÷5
16297957.4
n2
6640585385305369
n3
5.4113988860385E+23
n4
4.4097374259531E+31
n5
3.5934856356685E+39
2 √n9027.1693791576
3 √n433.54521190108
4 √n95.011417098986
5 √n38.213836095835
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81489788 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40744894 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9027.1694345459 Returns the nth root of the product of n divisors
H Harmonic Mean
1.999999975457 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81489787 can be divided by 2 positive divisors.
The sum of these divisors (counting 81489787) is 81489788, the average is 40744894.
Base
System
Value
2
Binary
100110110110110111101111011
3
Ternary
12200100002222021
4
Quaternary
10312312331323
5
Quinary
131330133122
6
Senary
12030335311
8
Octal
466667573
10
Decimal
81489787
12
Duodecimal
2335a537
16
Hexadecimal
4db6f7b
20
Vigesimal
1596497
36
Base36
1cilx7
md5
fe8fceec57ed875e9de9e586c5e790b2
sha1
69782c2bfaa99f7b43b00b5c56b92c223aba1d67
sha256
bb4d12faafb101bb6f2a2706cb98590e0c4545aeaf22bf6594dc9e68949f8aac
sha512
c65fcb3050e8f94a0a8f23e4b2ffb3c3faad6a93e826e4ea1a686c2e4cbe92b8edba3f4234bfefe468f13038f4b32ed0eb26dd916f9e8857db101d110a43ac9a
ripemd-160
a36956dced181edee829416f7d6742437aba5315
Diameter
162979574
Circumference
512015432.36359
Area
2.0862014262011E+16
Volume
2.266721464803E+24
Surface area
8.3448057048044E+16
Circumference
512015432.36359
Perimeter
325959148
Area
6640585385305369
Diagonal
115243961.97029
Surface area
39843512311832214
Volume
5.4113988860385E+23
Space diagonal
141144451.38197
Perimeter
244469361
Area
2.8754578198371E+15
Altitude
70572225.690983
Surface area
2.8754578198371E+15
Volume
6.3773947467052E+22
Height
38414653.990098