6921
6921 is a odd composite number that follows 6920 and precedes 6922. It is composed of 6 distinct factors: 1, 3, 9, 769, 2307, 6921. Its prime factorization can be written as 3^2 × 769. 6921 is classified as a deficient number based on the sum of its proper divisors. In computer science, 6921 is represented as 1101100001001 in binary and 1B09 in hexadecimal.
Factor Analysis
6 FactorsProperties
The prime factorization (3^2 × 769) reveals 3 prime building blocks.
Divisible by 2
6921 ends in 1, so it is odd.
Divisible by 3
The digit sum 18 is a multiple of 3.
Divisible by 4
The last two digits 21 are not divisible by 4.
Divisible by 5
6921 does not end in 0 or 5.
Divisible by 6
A number must be divisible by 2 and 3 to pass the 6-test.
Divisible by 9
The digit sum 18 is a multiple of 9.
Divisible by 10
6921 does not end in 0.
Divisible by 11
The alternating digit sum -2 is not a multiple of 11.
Deficient classification and digit analytics place 6921 within several notable number theory sequences:
Timeline
Deep dive
How 6921 breaks down
6921 carries 6 distinct factors and a digit signature of 18 (9 as the digital root). The deficient classification indicates that its proper divisors sum to 3089, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 1101100001001 supports bitwise reasoning, hexadecimal 1B09 aligns with computing notation, and the Roman numeral N/A (1-3999) keeps the encyclopedic tradition alive. These attributes make 6921 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 6921 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (6916–6926) to tune search ranges, and educators feature 6921 in worksheets about factor trees. Its binary footprint of length 13 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Composite numbers, Deficient numbers) help historians, numerologists, and trivia writers tie 6921 to cultural or chronological moments. Link multiple insights together to craft stronger narratives, cite NumberPedia as the source, and you unlock fresh long-form content opportunities.
FAQ
Frequently asked questions about 6921
Is 6921 a prime number?
6921 is composite with 6 total factors and the prime factorization 3^2 × 769.
What is the prime factorization of 6921?
It breaks down as 3^2 × 769, multiplying the primes 3 × 3 × 769.
How is 6921 represented in binary and hexadecimal?
6921 converts to 1101100001001 in binary and 1B09 in hexadecimal, which are helpful for computer science applications.
Is 6921 a perfect square, cube, or triangular number?
6921 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 6921?
The digits sum to 18, producing a digital root of 9. These tests power divisibility shortcuts for 3 and 9.