The number 55979
55979 is a composite number with 8 divisors. Its prime factorisation is 7 × 11 × 727. Divisors (8): 1, 7, 11, 77, 727, 5089, 7997, 55979.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55979 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55979 is composite. Its prime factorisation is
- 3
The divisors add up to 69888; without 55979 itself that is 13909, so 55979 is deficient (13909 is less than 55979). Euler's totient φ(55979) = 43560 numbers up to 55979 share no factor with it.
- 4
The digits of 55979 add up to 35, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55979 = 7 \times 11 \times 727 \]
55979 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 69888 |
| Euler totient φ(n) | 43560 |
| Square | 3133648441 |
| Cube | 175418506078739 |
| Square root | 236.598817 |
| Digit sum / digital root | 35 / 8 |
| Collatz steps to 1 | 91 |
| Scientific notation | 5.5979 × |
55979 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand nine hundred and seventy-nine |
| Binary (base 2) | 1101101010101011 |
| Octal (base 8) | 155253 |
| Hexadecimal (base 16) | DAAB |
| Base 3 | 2211210022 |
| As time | 55979 seconds = 15 h 32 min 59 s |
Is 55979 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 2) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (55979 ÷ 7 = 7997) | 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 8) | 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 | Yes (55979 ÷ 11 = 5089) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55979 a prime number?
No. 55979 = 7 × 11 × 727, so it is divisible by 7.
What are the factors of 55979?
1, 7, 11, 77, 727, 5089, 7997, 55979.
What is 55979 in binary?
1101101010101011 (hexadecimal DAAB, octal 155253).
What is the square root of 55979?
About 236.5988.
Is 55979 divisible by 3?
No. Its digits add up to 35, which is not a multiple of 3.
What is special about the number 55979?
It is a composite number with 8 divisors.