The number 67439
67439 is a composite number with 4 divisors. Its prime factorisation is 17 × 3967. Divisors (4): 1, 17, 3967, 67439.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 67439: a semiprime: 17 × 3967, the product of two primes.
- 2
67439 is composite. Its prime factorisation is
- 3
The divisors add up to 71424; without 67439 itself that is 3985, so 67439 is deficient (3985 is less than 67439). Euler's totient φ(67439) = 63456 numbers up to 67439 share no factor with it.
- 4
The digits of 67439 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 197 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67439 = 17 \times 3967 \]
67439 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71424 |
| Euler totient φ(n) | 63456 |
| Square | 4548018721 |
| Cube | 306713834525519 |
| Square root | 259.690200 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 197 |
| Scientific notation | 6.7439 × |
67439 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand four hundred and thirty-nine |
| Binary (base 2) | 10000011101101111 |
| Octal (base 8) | 203557 |
| Hexadecimal (base 16) | 1076F |
| Base 3 | 10102111202 |
| As time | 67439 seconds = 18 h 43 min 59 s |
Is 67439 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 3) | 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 7) | 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 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 67439 a prime number?
No. 67439 = 17 × 3967, so it is divisible by 17.
What are the factors of 67439?
1, 17, 3967, 67439.
What is 67439 in binary?
10000011101101111 (hexadecimal 1076F, octal 203557).
What is the square root of 67439?
About 259.6902.
Is 67439 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 67439?
67439 is a semiprime: 17 × 3967, the product of two primes.