The number 6979
6979 is a composite number with 4 divisors. Its prime factorisation is 7 × 997. Divisors (4): 1, 7, 997, 6979.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 6979: a semiprime: 7 × 997, the product of two primes.
- 2
6979 is composite. Its prime factorisation is
- 3
The divisors add up to 7984; without 6979 itself that is 1005, so 6979 is deficient (1005 is less than 6979). Euler's totient φ(6979) = 5976 numbers up to 6979 share no factor with it.
- 4
The digits of 6979 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 88 steps to reach 1.
LaTeX source of the formulas on this page
\[ 6979 = 7 \times 997 \]
6979 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 7984 |
| Euler totient φ(n) | 5976 |
| Square | 48706441 |
| Cube | 339922251739 |
| Square root | 83.540409 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 88 |
| Scientific notation | 6.979 × |
6979 in other forms
| Form | Value |
|---|---|
| In words | six thousand nine hundred and seventy-nine |
| Binary (base 2) | 1101101000011 |
| Octal (base 8) | 15503 |
| Hexadecimal (base 16) | 1B43 |
| Base 3 | 100120111 |
| As time | 6979 seconds = 1 h 56 min 19 s |
Is 6979 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (6979 ÷ 7 = 997) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 6979 a prime number?
No. 6979 = 7 × 997, so it is divisible by 7.
What are the factors of 6979?
1, 7, 997, 6979.
What is 6979 in binary?
1101101000011 (hexadecimal 1B43, octal 15503).
What is the square root of 6979?
About 83.5404.
Is 6979 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 6979?
6979 is a semiprime: 7 × 997, the product of two primes.