The number 73109
73109 is a composite number with 4 divisors. Its prime factorisation is 29 × 2521. Divisors (4): 1, 29, 2521, 73109.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 73109: a semiprime: 29 × 2521, the product of two primes.
- 2
73109 is composite. Its prime factorisation is
- 3
The divisors add up to 75660; without 73109 itself that is 2551, so 73109 is deficient (2551 is less than 73109). Euler's totient φ(73109) = 70560 numbers up to 73109 share no factor with it.
- 4
The digits of 73109 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 37 steps to reach 1.
LaTeX source of the formulas on this page
\[ 73109 = 29 \times 2521 \]
73109 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 75660 |
| Euler totient φ(n) | 70560 |
| Square | 5344925881 |
| Cube | 390762186234029 |
| Square root | 270.386760 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 37 |
| Scientific notation | 7.3109 × |
73109 in other forms
| Form | Value |
|---|---|
| In words | seventy-three thousand one hundred and nine |
| Binary (base 2) | 10001110110010101 |
| Octal (base 8) | 216625 |
| Hexadecimal (base 16) | 11D95 |
| Base 3 | 10201021202 |
| As time | 73109 seconds = 20 h 18 min 29 s |
Is 73109 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 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 5) | 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 | No (remainder 3) | 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 73109 a prime number?
No. 73109 = 29 × 2521, so it is divisible by 29.
What are the factors of 73109?
1, 29, 2521, 73109.
What is 73109 in binary?
10001110110010101 (hexadecimal 11D95, octal 216625).
What is the square root of 73109?
About 270.3868.
Is 73109 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 73109?
73109 is a semiprime: 29 × 2521, the product of two primes.