The number 71489
71489 is a composite number with 8 divisors. Its prime factorisation is 11 × 67 × 97. Divisors (8): 1, 11, 67, 97, 737, 1067, 6499, 71489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
71489 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
71489 is composite. Its prime factorisation is
- 3
The divisors add up to 79968; without 71489 itself that is 8479, so 71489 is deficient (8479 is less than 71489). Euler's totient φ(71489) = 63360 numbers up to 71489 share no factor with it.
- 4
The digits of 71489 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 143 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71489 = 11 \times 67 \times 97 \]
71489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 79968 |
| Euler totient φ(n) | 63360 |
| Square | 5110677121 |
| Cube | 365357196703169 |
| Square root | 267.374270 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 143 |
| Scientific notation | 7.1489 × |
71489 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and eighty-nine |
| Binary (base 2) | 10001011101000001 |
| Octal (base 8) | 213501 |
| Hexadecimal (base 16) | 11741 |
| Base 3 | 10122001202 |
| As time | 71489 seconds = 19 h 51 min 29 s |
Is 71489 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 1) | 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 | No (remainder 5) | 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 2) | 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 (71489 ÷ 11 = 6499) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71489 a prime number?
No. 71489 = 11 × 67 × 97, so it is divisible by 11.
What are the factors of 71489?
1, 11, 67, 97, 737, 1067, 6499, 71489.
What is 71489 in binary?
10001011101000001 (hexadecimal 11741, octal 213501).
What is the square root of 71489?
About 267.3743.
Is 71489 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 71489?
It is a composite number with 8 divisors.