The number 87007
87007 is a composite number with 4 divisors. Its prime factorisation is 167 × 521. Divisors (4): 1, 167, 521, 87007.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 87007: a semiprime: 167 × 521, the product of two primes.
- 2
87007 is composite. Its prime factorisation is
- 3
The divisors add up to 87696; without 87007 itself that is 689, so 87007 is deficient (689 is less than 87007). Euler's totient φ(87007) = 86320 numbers up to 87007 share no factor with it.
- 4
The digits of 87007 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 164 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87007 = 167 \times 521 \]
87007 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 87696 |
| Euler totient φ(n) | 86320 |
| Square | 7570218049 |
| Cube | 658661961789343 |
| Square root | 294.969490 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 164 |
| Scientific notation | 8.7007 × |
87007 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand and seven |
| Binary (base 2) | 10101001111011111 |
| Octal (base 8) | 251737 |
| Hexadecimal (base 16) | 153DF |
| Base 3 | 11102100111 |
| As time | 87007 seconds = 24 h 10 min 7 s |
Is 87007 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 4) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 87007 a prime number?
No. 87007 = 167 × 521, so it is divisible by 167.
What are the factors of 87007?
1, 167, 521, 87007.
What is 87007 in binary?
10101001111011111 (hexadecimal 153DF, octal 251737).
What is the square root of 87007?
About 294.9695.
Is 87007 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 87007?
87007 is a semiprime: 167 × 521, the product of two primes.