81761639 is an odd 8-digits prime number following 81761638
and preceding 81761640 . In scientific notation, it is written as 8.1761639 × 10^7.
The sum of its digits is 41. It has a total of 1 prime factors and 2 positive divisors.
There are 81761638 positive integers (up to 81761639) that are relatively prime to 81761639.
81761639 has 2 divisors, whose sum is 81761640
The reverse of 81761639 is 93616718
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 41 Digital Root 5
Name
eighty-one million seven hundred sixty-one thousand six hundred thirty-nine
Scientific notation
8.1761639 × 10^7
Engineering notation
8.1761639 × 10^6
Prime Factorization
81761639
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81761639 Product of the distinct prime numbers
The prime factorization of 81761639 is 81761639.
Since it has a total of 1 prime factors.
10 , 7 , 62 , 69 , 667 , 229 , 2779 , 1612 , 19711 , 69957 , 720095 , 902424 , 5951040 , 3336895 , 22978208 , 52625060 , 486844009 , 958207139 , 8897780271 , 7225253143
n×2
163523278
n×3
245284917
n×4
327046556
n×5
408808195
n÷2
40880819.5
n÷3
27253879.666667
n÷3
20440409.75
n÷5
16352327.8
n2
6684965611966321
n3
5.46573745093E+23
n4
4.4688765233172E+31
n5
3.6538266903504E+39
2 √n9042.2142752757
3 √n434.02678273418
4 √n95.090558286697
5 √n38.239298606672
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81761640 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40880820 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9042.2143305719 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999755387 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81761639 can be divided by 2 positive divisors.
The sum of these divisors (counting 81761639) is 81761640, the average is 40880820.
Base
System
Value
2
Binary
100110111111001010101100111
3
Ternary
12200211220212212
4
Quaternary
10313321111213
5
Quinary
131412333024
6
Senary
12040234035
8
Octal
467712547
10
Decimal
81761639
12
Duodecimal
2346b91b
16
Hexadecimal
4df9567
20
Vigesimal
15b041j
36
Base36
1cofon
md5
7cff50a0a8f6755d246d26ea02b393c2
sha1
41662b12829bc43d2bd82cd1d21551f8ba13019d
sha256
9236c1dd71ddb64291b1adbee7cb044d1f5e71efeea5759f5104b9e4912af77f
sha512
4f6af7448878509b8d663a2f8a919a5eb0f2d969594e1810c7b11707cbbb0e6ce1cb29350981e891330cca80afa12a0ccc9b5bcefbc70785311885c3b145b910
ripemd-160
9885ea65086546cbcd826a084573cfacbb9e5609
Diameter
163523278
Circumference
513723528.85572
Area
2.1001438856054E+16
Volume
2.289482749639E+24
Surface area
8.4005755424215E+16
Circumference
513723528.85572
Perimeter
327046556
Area
6684965611966321
Diagonal
115628418.75565
Surface area
40109793671797926
Volume
5.46573745093E+23
Space diagonal
141615312.85811
Perimeter
245284917
Area
2.8946750216941E+15
Altitude
70807656.429053
Surface area
2.8946750216941E+15
Volume
6.4414333595632E+22
Height
38542806.251884