The number 73481
73481 is a composite number with 4 divisors. Its prime factorisation is 197 × 373. Divisors (4): 1, 197, 373, 73481.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 73481: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 197 × 373, the product of two primes.
- 2
73481 is composite. Its prime factorisation is
- 3
The divisors add up to 74052; without 73481 itself that is 571, so 73481 is deficient (571 is less than 73481). Euler's totient φ(73481) = 72912 numbers up to 73481 share no factor with it.
- 4
The digits of 73481 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 73481 = 197 \times 373 \]
73481 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 74052 |
| Euler totient φ(n) | 72912 |
| Square | 5399457361 |
| Cube | 396757526343641 |
| Square root | 271.073791 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 125 |
| Scientific notation | 7.3481 × |
73481 in other forms
| Form | Value |
|---|---|
| In words | seventy-three thousand four hundred and eighty-one |
| Binary (base 2) | 10001111100001001 |
| Octal (base 8) | 217411 |
| Hexadecimal (base 16) | 11F09 |
| Base 3 | 10201210112 |
| As time | 73481 seconds = 20 h 24 min 41 s |
Is 73481 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 1) | 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 2) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 73481 a prime number?
No. 73481 = 197 × 373, so it is divisible by 197.
What are the factors of 73481?
1, 197, 373, 73481.
What is 73481 in binary?
10001111100001001 (hexadecimal 11F09, octal 217411).
What is the square root of 73481?
About 271.0738.
Is 73481 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 73481?
73481 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 197 × 373, the product of two primes.