The number 5449
5449 is the 721st prime number. Its only divisors are 1 and 5449.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 5449: the 721st prime number.
- 2
5449 is prime, so its only factors are 1 and 5449. It is the 721st prime; the next prime is 5471 and the one before is 5443.
- 3
The divisors add up to 5450; without 5449 itself that is 1, so 5449 is deficient (1 is less than 5449). Euler's totient φ(5449) = 5448 numbers up to 5449 share no factor with it.
- 4
The digits of 5449 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 160 steps to reach 1.
5449 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 5450 |
| Euler totient φ(n) | 5448 |
| Square | 29691601 |
| Cube | 161789533849 |
| Square root | 73.817342 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 160 |
| Scientific notation | 5.449 × |
5449 in other forms
| Form | Value |
|---|---|
| In words | five thousand four hundred and forty-nine |
| Binary (base 2) | 1010101001001 |
| Octal (base 8) | 12511 |
| Hexadecimal (base 16) | 1549 |
| Base 3 | 21110211 |
| As time | 5449 seconds = 1 h 30 min 49 s |
Is 5449 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 4) | 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 5449 a prime number?
Yes. 5449 is divisible only by 1 and itself.
What are the factors of 5449?
1, 5449.
What is 5449 in binary?
1010101001001 (hexadecimal 1549, octal 12511).
What is the square root of 5449?
About 73.8173.
Is 5449 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 5449?
5449 is the 721st prime number.