1991231065 is an odd 10-digits composite number following 1991231064
and preceding 1991231066 . In scientific notation, it is written as 1.991231065 × 10^9.
The sum of its digits is 37. It has a total of 4 prime factors and 16 positive divisors.
There are 1505528640 positive integers (up to 1991231065) that are relatively prime to 1991231065.
1991231065 has 16 divisors, whose sum is 2521264320
The reverse of 1991231065 is 5601321991
Previous prime number is 421
Is Prime? no Number parity odd Number length 10 Sum of Digits 37 Digital Root 1
Name
one billion nine hundred ninety-one million two hundred thirty-one thousand sixty-five
Scientific notation
1.991231065 × 10^9
Engineering notation
1.991231065 × 10^9
Prime Factorization
5 × 19 × 421 × 49787
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
1991231065 Product of the distinct prime numbers
The prime factorization of 1991231065 is 5 × 19 × 421 × 49787.
Since it has a total of 4 prime factors.
5 , 3 , 16 , 100 , 476 , 247 , 4777 , 66 , 77060 , 69664 , 485621 , 599505 , 5474473 , 602595 , 90993092 , 16265702 , 721358970 , 764796720 , 3623307969 , 4081476973
n×2
3982462130
n×3
5973693195
n×4
7964924260
n×5
9956155325
n÷2
995615532.5
n÷3
663743688.33333
n÷3
497807766.25
n÷5
398246213
n2
3965001154221034225
n3
7.8952334710458E+27
n4
1.5721234152974E+37
n5
3.1304609825541E+46
2 √n44623.212177072
3 √n1258.0769912262
4 √n211.24207009275
5 √n72.414299153307
1 , 5 , 19 , 95 , 421 , 2105 , 7999 , 39995 , 49787 , 248935 , 945953 , 4729765 , 20960327 , 104801635 , 398246213 , 1991231065
16 divisors
τ Total Divisors
16 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-1991231064 Sum of the proper positive divisors of n
A Arithmetic Mean
0.0625 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
16 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 1991231065 can be divided by 16 positive divisors.
The sum of these divisors (counting 1991231065) is 1, the average is 0.0625.
Base
System
Value
2
Binary
1110110101011111100011001011001
3
Ternary
12010202212000111201
4
Quaternary
1312223330121121
5
Quinary
13034223343230
6
Senary
525330554201
8
Octal
16653743131
10
Decimal
1991231065
12
Duodecimal
476a38961
16
Hexadecimal
76afc659
20
Vigesimal
1b253hd5
36
Base36
wxizq1
md5
d8cd75b3b06ae1630ce89a0ee7a132a7
sha1
494562e952e37fd82e400c119ba60cd457eb06df
sha256
83eb73c040c4491b55d7b373575b13b022f8df73a7df35746c553fb8f3bcde55
sha512
2b938baaa13886e39aecbc4bc42731cf574fc6a7e732f2b04719eefface88f4fac8c78660b5a80d2c8e38400c56c5f8ffb3c596d42714b9d1f702b59c88190f6
ripemd-160
cdbca8bc4694bd111e097a65b48d7df9b99a3dfa
Diameter
3982462130
Circumference
12511273770.808
Area
1.2456418497576E+19
Volume
3.3071476628018E+28
Surface area
4.9825673990303E+19
Circumference
12511273770.808
Perimeter
7964924260
Area
3965001154221034225
Diagonal
2816025977.9416
Surface area
2.3790006925326E+19
Volume
7.8952334710458E+27
Space diagonal
3448913374.1895
Perimeter
5973693195
Area
1.716895862795E+18
Altitude
1724456687.0947
Surface area
1.716895862795E+18
Volume
9.3046218773791E+26
Height
938675325.98054