The number 50987
50987 is a composite number with 4 divisors. Its prime factorisation is 67 × 761. Divisors (4): 1, 67, 761, 50987.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 50987: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 67 × 761, the product of two primes.
- 2
50987 is composite. Its prime factorisation is
- 3
The divisors add up to 51816; without 50987 itself that is 829, so 50987 is deficient (829 is less than 50987). Euler's totient φ(50987) = 50160 numbers up to 50987 share no factor with it.
- 4
The digits of 50987 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 83 steps to reach 1.
LaTeX source of the formulas on this page
\[ 50987 = 67 \times 761 \]
50987 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 51816 |
| Euler totient φ(n) | 50160 |
| Square | 2599674169 |
| Cube | 132549586854803 |
| Square root | 225.803011 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 83 |
| Scientific notation | 5.0987 × |
50987 in other forms
| Form | Value |
|---|---|
| In words | fifty thousand nine hundred and eighty-seven |
| Binary (base 2) | 1100011100101011 |
| Octal (base 8) | 143453 |
| Hexadecimal (base 16) | C72B |
| Base 3 | 2120221102 |
| As time | 50987 seconds = 14 h 9 min 47 s |
Is 50987 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 2) | 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 6) | 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 3) | 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 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | 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 50987 a prime number?
No. 50987 = 67 × 761, so it is divisible by 67.
What are the factors of 50987?
1, 67, 761, 50987.
What is 50987 in binary?
1100011100101011 (hexadecimal C72B, octal 143453).
What is the square root of 50987?
About 225.8030.
Is 50987 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 50987?
50987 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 67 × 761, the product of two primes.