The number 36689
36689 is a composite number with 4 divisors. Its prime factorisation is 19 × 1931. Divisors (4): 1, 19, 1931, 36689.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 36689: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 19 × 1931, the product of two primes.
- 2
36689 is composite. Its prime factorisation is
- 3
The divisors add up to 38640; without 36689 itself that is 1951, so 36689 is deficient (1951 is less than 36689). Euler's totient φ(36689) = 34740 numbers up to 36689 share no factor with it.
- 4
The digits of 36689 add up to 32, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 155 steps to reach 1.
LaTeX source of the formulas on this page
\[ 36689 = 19 \times 1931 \]
36689 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 38640 |
| Euler totient φ(n) | 34740 |
| Square | 1346082721 |
| Cube | 49386428950769 |
| Square root | 191.543729 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 155 |
| Scientific notation | 3.6689 × |
36689 in other forms
| Form | Value |
|---|---|
| In words | thirty-six thousand six hundred and eighty-nine |
| Binary (base 2) | 1000111101010001 |
| Octal (base 8) | 107521 |
| Hexadecimal (base 16) | 8F51 |
| Base 3 | 1212022212 |
| As time | 36689 seconds = 10 h 11 min 29 s |
Is 36689 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 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 2) | 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 5) | 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 4) | 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 36689 a prime number?
No. 36689 = 19 × 1931, so it is divisible by 19.
What are the factors of 36689?
1, 19, 1931, 36689.
What is 36689 in binary?
1000111101010001 (hexadecimal 8F51, octal 107521).
What is the square root of 36689?
About 191.5437.
Is 36689 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 36689?
36689 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 19 × 1931, the product of two primes.