The number 80979
80979 is a composite number with 4 divisors. Its prime factorisation is 3 × 26993. Divisors (4): 1, 3, 26993, 80979.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80979: a semiprime: 3 × 26993, the product of two primes.
- 2
80979 is composite. Its prime factorisation is
- 3
The divisors add up to 107976; without 80979 itself that is 26997, so 80979 is deficient (26997 is less than 80979). Euler's totient φ(80979) = 53984 numbers up to 80979 share no factor with it.
- 4
The digits of 80979 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 213 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80979 = 3 \times 26993 \]
80979 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 107976 |
| Euler totient φ(n) | 53984 |
| Square | 6557598441 |
| Cube | 531027764153739 |
| Square root | 284.568094 |
| Digit sum / digital root | 33 / 6 |
| Collatz steps to 1 | 213 |
| Scientific notation | 8.0979 × |
80979 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand nine hundred and seventy-nine |
| Binary (base 2) | 10011110001010011 |
| Octal (base 8) | 236123 |
| Hexadecimal (base 16) | 13C53 |
| Base 3 | 11010002020 |
| As time | 80979 seconds = 22 h 29 min 39 s |
Is 80979 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 (80979 ÷ 3 = 26993) | 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 3) | 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 8) | 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 80979 a prime number?
No. 80979 = 3 × 26993, so it is divisible by 3.
What are the factors of 80979?
1, 3, 26993, 80979.
What is 80979 in binary?
10011110001010011 (hexadecimal 13C53, octal 236123).
What is the square root of 80979?
About 284.5681.
Is 80979 divisible by 3?
Yes. Its digits add up to 33, a multiple of 3.
What is special about the number 80979?
80979 is a semiprime: 3 × 26993, the product of two primes.