The number 61489
61489 is a composite number with 4 divisors. Its prime factorisation is 17 × 3617. Divisors (4): 1, 17, 3617, 61489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 61489: a semiprime: 17 × 3617, the product of two primes.
- 2
61489 is composite. Its prime factorisation is
- 3
The divisors add up to 65124; without 61489 itself that is 3635, so 61489 is deficient (3635 is less than 61489). Euler's totient φ(61489) = 57856 numbers up to 61489 share no factor with it.
- 4
The digits of 61489 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61489 = 17 \times 3617 \]
61489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 65124 |
| Euler totient φ(n) | 57856 |
| Square | 3780897121 |
| Cube | 232483583073169 |
| Square root | 247.969756 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 60 |
| Scientific notation | 6.1489 × |
61489 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand four hundred and eighty-nine |
| Binary (base 2) | 1111000000110001 |
| Octal (base 8) | 170061 |
| Hexadecimal (base 16) | F031 |
| Base 3 | 10010100101 |
| As time | 61489 seconds = 17 h 4 min 49 s |
Is 61489 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 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 10) | 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 61489 a prime number?
No. 61489 = 17 × 3617, so it is divisible by 17.
What are the factors of 61489?
1, 17, 3617, 61489.
What is 61489 in binary?
1111000000110001 (hexadecimal F031, octal 170061).
What is the square root of 61489?
About 247.9698.
Is 61489 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 61489?
61489 is a semiprime: 17 × 3617, the product of two primes.