161918897 is an odd 9-digits composite number following 161918896
and preceding 161918898 . In scientific notation, it is written as 1.61918897 × 10^8.
The sum of its digits is 50. It has a total of 4 prime factors and 12 positive divisors.
There are 130622016 positive integers (up to 161918897) that are relatively prime to 161918897.
161918897 has 12 divisors, whose sum is 196578240
The reverse of 161918897 is 798819161
Previous prime number is 17
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 50
Digital Root 5
Name
one hundred sixty-one million nine hundred eighteen thousand eight hundred ninety-seven
Scientific notation
1.61918897 × 10^8
Engineering notation
1.61918897 × 10^6
Prime Factorization
7 × 17 × 17 × 80039
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
9524641
Product of the distinct prime numbers
The prime factorization of 161918897 is 7 × 17 × 17 × 80039.
Since it has a total of 4 prime factors.
6 , 5 , 49 , 48 , 148 , 413 , 8955 , 6262 , 5571 , 46965 , 464677 , 414331 , 837552 , 9828069 , 1492410 , 89987480 , 607752324 , 99369483 , 6861015924 , 9064207696
n×2
323837794
n×3
485756691
n×4
647675588
n×5
809594485
n÷2
80959448.5
n÷3
53972965.666667
n÷3
40479724.25
n÷5
32383779.4
n2
26217729205696609
n3
4.2451457948311E+24
n4
6.8736932470324E+32
n5
1.1129808288758E+41
2 √n
12724.735635761
3 √n
545.04519110159
4 √n
112.80396994681
5 √n
43.838885766509
1 , 7 , 17 , 119 , 289 , 2023 , 80039 , 560273 , 1360663 , 9524641 , 23131271 , 161918897
12 divisors
τ
Total Divisors
12
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-161918896
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.083333333333333
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
12
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 161918897 can be divided by 12 positive divisors.
The sum of these divisors (counting 161918897) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
1001101001101010111110110001
3
Ternary
102021200022222012
4
Quaternary
21221222332301
5
Quinary
312422401042
6
Senary
24022252305
8
Octal
1151527661
10
Decimal
161918897
12
Duodecimal
46287095
16
Hexadecimal
9a6afb1
20
Vigesimal
2abjh4h
36
Base36
2oehf5
md5
753238c486fd7b5673ea48af25816efb
sha1
09fdb1d78aad8f7e29f3db84c9a638218a1b5a74
sha256
bb6978bb138d82f974f8533e4dd4d2130567e19ef1c23bd934a2923301df96b9
sha512
c56fbe4f3aba479cab3f1feae3bf8ce3822b1458fb69668f5f92cd55d93b48078584a0398bcbebf2526a006159d4f0851315eb9d25c8ae6c09dd87dab702e19b
ripemd-160
fcf91882ccbfd140993f7973a83ad3b226bd2244
Diameter
323837794
Circumference
1017366434.5851
Area
8.2365425466423E+16
Volume
1.7782025123279E+25
Surface area
3.2946170186569E+17
Circumference
1017366434.5851
Perimeter
647675588
Area
26217729205696609
Diagonal
228987900.14189
Surface area
157306375234179654
Volume
4.2451457948311E+24
Space diagonal
280451756.30951
Perimeter
485756691
Area
1.1352609760837E+16
Altitude
140225878.15476
Surface area
1.1352609760837E+16
Volume
5.002952297751E+23
Height
76329300.047297