138791981 (number)

138791981 is an odd 9-digits composite number following 138791980 and preceding 138791982. In scientific notation, it is written as 1.38791981 × 10^8. The sum of its digits is 47. It has a total of 2 prime factors and 4 positive divisors. There are 138684000 positive integers (up to 138791981) that are relatively prime to 138791981.

Interesting facts

Basic properties

Name

Name one hundred thirty-eight million seven hundred ninety-one thousand nine hundred eighty-one

Notation

Scientific notation 1.38791981 × 10^8
Engineering notation 1.38791981 × 10^6

Prime Factorization of 138791981

Prime Factorization 1301 × 106681

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 138791981
Product of the distinct prime numbers

The prime factorization of 138791981 is 1301 × 106681. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 7, 6, 5, 717, 188, 7194, 7304, 73834, 77673, 123146, 597625, 4710290, 60063, 61483329, 70027088, 955470720, 99195248, 5178563458, 2025921876

Basic calculations (n = 138791981)

Multiplication

n×y
n×2 277583962
n×3 416375943
n×4 555167924
n×5 693959905

Division

n÷y
n÷2 69395990.5
n÷3 46263993.666667
n÷3 34697995.25
n÷5 27758396.2

Exponentiation

ny
n2 19263213989904361
n3 2.6735796300857E+24
n4 3.7107141322085E+32
n5 5.1501736533391E+40

Nth Root

y√n
2√n 11781.000848824
3√n 517.75161016457
4√n 108.54031900093
5√n 42.508215626972

Divisors of 138791981

1, 1301, 106681, 138791981

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -138791980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 138791981 can be divided by 4 positive divisors. The sum of these divisors (counting 138791981) is 1, the average is 0.25.

Base conversion 138791981

Base System Value
2 Binary 1000010001011100110000101101
3 Ternary 100200011100210202
4 Quaternary 20101130300231
5 Quinary 241012320411
6 Senary 21434443245
8 Octal 1021346055
10 Decimal 138791981
12 Duodecimal 3a593525
16 Hexadecimal 845cc2d
20 Vigesimal 2378jj1
36 Base36 2amskt

Cryptographic Hash Functions

md5 27b5adf867b5f5bbdfd2141588866ee7
sha1 350debd919894387f2c2bd5701f43439d1d4e3f0
sha256 f5fd9d038dd7cd10f901fbd5c94a8f726b4629214f7f52b85c95c185f4311cca
sha512 c9f67bf7c6dacf517a9e44d2feb1b457e746743a89626581f4989464255d6b55eeedf03c2dd3dfeba389378a149dcf8cf40ff9b597063eaf563269841e8fa237
ripemd-160 a2978629597b44fbe513822af88db1cd54efb5f5

138791981 as geometric shapes

Circle

Radius = n
Diameter 277583962
Circumference 872055735.77355
Area 6.0517171555212E+16

Sphere

Radius = n
Volume 1.119906416622E+25
Surface area 2.4206868622085E+17
Circumference 872055735.77355

Square

Length = n
Perimeter 555167924
Area 19263213989904361
Diagonal 196281501.87883

Cube

Length = n
Surface area 115579283939426166
Volume 2.6735796300857E+24
Space diagonal 240394762.77513

Equilateral Triangle

Length = n
Perimeter 416375943
Area 8.3412163368965E+15
Altitude 120197381.38757

Triangular Pyramid

Length = n
Surface area 8.3412163368965E+15
Volume 3.1508438107931E+23
Height 65427167.292943