The number 73489
73489 is a composite number with 4 divisors. Its prime factorisation is 13 × 5653. Divisors (4): 1, 13, 5653, 73489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 73489: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 13 × 5653, the product of two primes.
- 2
73489 is composite. Its prime factorisation is
- 3
The divisors add up to 79156; without 73489 itself that is 5667, so 73489 is deficient (5667 is less than 73489). Euler's totient φ(73489) = 67824 numbers up to 73489 share no factor with it.
- 4
The digits of 73489 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 187 steps to reach 1.
LaTeX source of the formulas on this page
\[ 73489 = 13 \times 5653 \]
73489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 79156 |
| Euler totient φ(n) | 67824 |
| Square | 5400633121 |
| Cube | 396887127429169 |
| Square root | 271.088546 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 187 |
| Scientific notation | 7.3489 × |
73489 in other forms
| Form | Value |
|---|---|
| In words | seventy-three thousand four hundred and eighty-nine |
| Binary (base 2) | 10001111100010001 |
| Octal (base 8) | 217421 |
| Hexadecimal (base 16) | 11F11 |
| Base 3 | 10201210211 |
| As time | 73489 seconds = 20 h 24 min 49 s |
Is 73489 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 4) | 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 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 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | 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 73489 a prime number?
No. 73489 = 13 × 5653, so it is divisible by 13.
What are the factors of 73489?
1, 13, 5653, 73489.
What is 73489 in binary?
10001111100010001 (hexadecimal 11F11, octal 217421).
What is the square root of 73489?
About 271.0885.
Is 73489 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 73489?
73489 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 13 × 5653, the product of two primes.