The number 87713
87713 is a composite number with 4 divisors. Its prime factorisation is 239 × 367. Divisors (4): 1, 239, 367, 87713.
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How to work it out
- 1
What is special about 87713: a semiprime: 239 × 367, the product of two primes.
- 2
87713 is composite. Its prime factorisation is
- 3
The divisors add up to 88320; without 87713 itself that is 607, so 87713 is deficient (607 is less than 87713). Euler's totient φ(87713) = 87108 numbers up to 87713 share no factor with it.
- 4
The digits of 87713 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87713 = 239 \times 367 \]
87713 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 88320 |
| Euler totient φ(n) | 87108 |
| Square | 7693570369 |
| Cube | 674826137776097 |
| Square root | 296.163806 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 125 |
| Scientific notation | 8.7713 × |
87713 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand seven hundred and thirteen |
| Binary (base 2) | 10101011010100001 |
| Octal (base 8) | 253241 |
| Hexadecimal (base 16) | 156A1 |
| Base 3 | 11110022122 |
| As time | 87713 seconds = 24 h 21 min 53 s |
Is 87713 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 3) | 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 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 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 87713 a prime number?
No. 87713 = 239 × 367, so it is divisible by 239.
What are the factors of 87713?
1, 239, 367, 87713.
What is 87713 in binary?
10101011010100001 (hexadecimal 156A1, octal 253241).
What is the square root of 87713?
About 296.1638.
Is 87713 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 87713?
87713 is a semiprime: 239 × 367, the product of two primes.