The number 80977
80977 is a composite number with 4 divisors. Its prime factorisation is 13 × 6229. Divisors (4): 1, 13, 6229, 80977.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80977: a semiprime: 13 × 6229, the product of two primes.
- 2
80977 is composite. Its prime factorisation is
- 3
The divisors add up to 87220; without 80977 itself that is 6243, so 80977 is deficient (6243 is less than 80977). Euler's totient φ(80977) = 74736 numbers up to 80977 share no factor with it.
- 4
The digits of 80977 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 182 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80977 = 13 \times 6229 \]
80977 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 87220 |
| Euler totient φ(n) | 74736 |
| Square | 6557274529 |
| Cube | 530988419534833 |
| Square root | 284.564580 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 182 |
| Scientific notation | 8.0977 × |
80977 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand nine hundred and seventy-seven |
| Binary (base 2) | 10011110001010001 |
| Octal (base 8) | 236121 |
| Hexadecimal (base 16) | 13C51 |
| Base 3 | 11010002011 |
| As time | 80977 seconds = 22 h 29 min 37 s |
Is 80977 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 | 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 1) | 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 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80977 a prime number?
No. 80977 = 13 × 6229, so it is divisible by 13.
What are the factors of 80977?
1, 13, 6229, 80977.
What is 80977 in binary?
10011110001010001 (hexadecimal 13C51, octal 236121).
What is the square root of 80977?
About 284.5646.
Is 80977 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 80977?
80977 is a semiprime: 13 × 6229, the product of two primes.