821
Prime Number 821: Properties and Meaning
Short answer
The number 821 is an odd prime, so its only positive divisors are 1 and 821.
Is 821 prime?
ClassificationPrimeParityOddDivisor count2AbundanceDeficient
What is the prime factorization of 821?
Prime factorization
821
What are the divisors of 821?
Divisor count
2
Divisor sum
822
Proper divisor sum
1
How is 821 classified?
How is 821 represented in other numeral systems?
Decimal
821
Binary
1100110101
Octal
1465
Hexadecimal
335
Roman
DCCCXXILearn more →
In words
eight hundred twenty one
Roots and powers
Square root
28.653098 Approximate
Cube root
9.363705 Approximate
Nearest lower square
784
Nearest higher square
841
Nearest lower cube
729
Nearest higher cube
1000
What are the digit properties of 821?
Which numbers are related to 821?
Compare this number
FAQ for 821
- Is 821 prime?
- Yes
- What is the prime factorization of 821?
- 821
- Is 821 a perfect square?
- No
- What is 821 in binary?
- 1100110101
- What is 821 in Roman numerals?
- DCCCXXI