The number 33139
33139 is a composite number with 4 divisors. Its prime factorisation is 31 × 1069. Divisors (4): 1, 31, 1069, 33139.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 33139: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 31 × 1069, the product of two primes.
- 2
33139 is composite. Its prime factorisation is
- 3
The divisors add up to 34240; without 33139 itself that is 1101, so 33139 is deficient (1101 is less than 33139). Euler's totient φ(33139) = 32040 numbers up to 33139 share no factor with it.
- 4
The digits of 33139 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 67 steps to reach 1.
LaTeX source of the formulas on this page
\[ 33139 = 31 \times 1069 \]
33139 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 34240 |
| Euler totient φ(n) | 32040 |
| Square | 1098193321 |
| Cube | 36393028464619 |
| Square root | 182.041204 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 67 |
| Scientific notation | 3.3139 × |
33139 in other forms
| Form | Value |
|---|---|
| In words | thirty-three thousand one hundred and thirty-nine |
| Binary (base 2) | 1000000101110011 |
| Octal (base 8) | 100563 |
| Hexadecimal (base 16) | 8173 |
| Base 3 | 1200110101 |
| As time | 33139 seconds = 9 h 12 min 19 s |
Is 33139 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 4) | 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 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 7) | 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 33139 a prime number?
No. 33139 = 31 × 1069, so it is divisible by 31.
What are the factors of 33139?
1, 31, 1069, 33139.
What is 33139 in binary?
1000000101110011 (hexadecimal 8173, octal 100563).
What is the square root of 33139?
About 182.0412.
Is 33139 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 33139?
33139 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 31 × 1069, the product of two primes.