Math question: What is the largest prime factor of 981?

To find the largest prime factor of 981, we need to factorize it. Starting with the smallest prime number, 2, we divide 981 by it which gives us 490 remainder 1. Next, dividing it by 3, we obtain 327, which is not divisible evenly. Continuing with 5, we find no divisibility. Finally, dividing by 7, we get 140 remainder 1. Proceeding further with 11, we find that it is not divisible. Thus, the largest prime factor of 981 is 7, as it cannot be divided evenly by any prime number beyond that.

What is the sum of the digits of the number 981?

The digits of the number 981 are 9, 8, and 1. To find the sum of these digits, we add them together: 9 + 8 + 1 = 18. Therefore, the sum of the digits of the number 981 is 18.

Math Question: If a number is divisible by 3, 9, and 27, what is the smallest perfect square greater than 981?

To find the smallest perfect square greater than 981, we need to find the smallest number divisible by 3, 9, and 27. The smallest number divisible by these three is their least common multiple, which is 27. And since 27 is a perfect cube, the smallest perfect square greater than 981 would be (27^2) = 729. Therefore, the answer is 729.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

981 (number)

981 is an odd 3-digits composite number following 980 and preceding 982. In scientific notation, it is written as 9.81 × 10^2. The sum of its digits is 18. It has a total of 2 prime factors and 4 positive divisors. There are 648 positive integers (up to 981) that are relatively prime to 981.

Interesting facts

981 has 4 divisors, whose sum is 1100
The reverse of 981 is 189
Previous prime number is 9

Basic properties

Is Prime? no
Number parity odd
Number length 3
Sum of Digits 18
Digital Root 9

Name

Name	nine hundred eighty-one

Notation

Scientific notation	9.81 × 10^2
Engineering notation	9.81 × 10^0

Prime Factorization of 981

Prime Factorization 9 × 109

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	981	Product of the distinct prime numbers

The prime factorization of 981 is 9 × 109. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 7, 57, 66, 172, 763, 4335, 2478, 61215, 99422, 212921, 782066, 4400765, 5646454, 22961696, 23686628, 875145739, 763269814, 7628302552, 6271796830

Basic calculations (n = 981)

Multiplication

n×y

n×2	1962
n×3	2943
n×4	3924
n×5	4905

Division

n÷y

n÷2	490.5
n÷3	327
n÷3	245.25
n÷5	196.2

Exponentiation

n^y

n²	962361
n³	944076141
n⁴	926138694321
n⁵	908542059128901

Nth Root

^y√n

²√n	31.320919526732
³√n	9.9362612672164
⁴√n	5.5965095842616
⁵√n	3.965827331319

Divisors of 981

1, 9, 109, 981

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	-980	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 981 can be divided by 4 positive divisors. The sum of these divisors (counting 981) is 1, the average is 0.25.

Base conversion 981

Base	System	Value
2	Binary	1111010101
3	Ternary	1100100
4	Quaternary	33111
5	Quinary	12411
6	Senary	4313
8	Octal	1725
10	Decimal	981
12	Duodecimal	699
16	Hexadecimal	3d5
20	Vigesimal	291
36	Base36	r9

Cryptographic Hash Functions

md5	287e03db1d99e0ec2edb90d079e142f3
sha1	32f9e6523b5b6b4675045d799fd81b11645b3cfb
sha256	aaf5060b9517ba4f550ee34a7f3ed7b05b6e5100a523d3e0aae05bf4f8f7ec34
sha512	0c7935d897fcb9967255a965885ae6d53fd03610bee6726326ca3b283bf56c58c47652972c27b7645dc632ae3e5139e4d507b771050e60e8f8ae7dc2889cf7f1
ripemd-160	93e4e8f469cb728b9df33bf45b4e5f5f541b1c4b

981 as geometric shapes

Circle

Radius = n

Diameter	1962
Circumference	6163.8047863432
Area	3023346.2477013

Sphere

Radius = n

Volume	3954536891.9933
Surface area	12093384.990805
Circumference	6163.8047863432

Square

Length = n

Perimeter	3924
Area	962361
Diagonal	1387.343504688

Cube

Length = n

Surface area	5774166
Volume	944076141
Space diagonal	1699.1418422251

Equilateral Triangle

Length = n

Perimeter	2943
Area	416714.5368057
Altitude	849.57092111253

Triangular Pyramid

Length = n

Surface area	416714.5368057
Volume	111260440.20959
Height	462.447834896