The number 26979
26979 is a composite number with 12 divisors. Its prime factorisation is 3 × 17 × . Divisors (12): 1, 3, 17, 23, 51, 69, 391, 529, 1173, 1587, 8993, 26979.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
26979 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
26979 is composite. Its prime factorisation is
- 3
The divisors add up to 39816; without 26979 itself that is 12837, so 26979 is deficient (12837 is less than 26979). Euler's totient φ(26979) = 16192 numbers up to 26979 share no factor with it.
- 4
The digits of 26979 add up to 33, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 77 steps to reach 1.
LaTeX source of the formulas on this page
\[ 26979 = 3 \times 17 \times 23^{2} \]26979 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 39816 |
| Euler totient φ(n) | 16192 |
| Square | 727866441 |
| Cube | 19637108711739 |
| Square root | 164.252854 (= 23√51) |
| Digit sum / digital root | 33 / 6 |
| Collatz steps to 1 | 77 |
| Scientific notation | 2.6979 × |
26979 in other forms
| Form | Value |
|---|---|
| In words | twenty-six thousand nine hundred and seventy-nine |
| Binary (base 2) | 110100101100011 |
| Octal (base 8) | 64543 |
| Hexadecimal (base 16) | 6963 |
| Base 3 | 1101000020 |
| As time | 26979 seconds = 7 h 29 min 39 s |
Is 26979 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 | Yes (26979 ÷ 3 = 8993) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 6) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 26979 a prime number?
No. 26979 = 3 × 17 × , so it is divisible by 3.
What are the factors of 26979?
1, 3, 17, 23, 51, 69, 391, 529, 1173, 1587, 8993, 26979.
What is 26979 in binary?
110100101100011 (hexadecimal 6963, octal 64543).
What is the square root of 26979?
About 164.2529, exactly 23√51.
Is 26979 divisible by 3?
Yes. Its digits add up to 33, a multiple of 3.
What is special about the number 26979?
It is a composite number with 12 divisors.