The number 3139
3139 is a composite number with 4 divisors. Its prime factorisation is 43 × 73. Divisors (4): 1, 43, 73, 3139.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 3139: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 43 × 73, the product of two primes.
- 2
3139 is composite. Its prime factorisation is
- 3
The divisors add up to 3256; without 3139 itself that is 117, so 3139 is deficient (117 is less than 3139). Euler's totient φ(3139) = 3024 numbers up to 3139 share no factor with it.
- 4
The digits of 3139 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 35 steps to reach 1.
LaTeX source of the formulas on this page
\[ 3139 = 43 \times 73 \]
3139 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 3256 |
| Euler totient φ(n) | 3024 |
| Square | 9853321 |
| Cube | 30929574619 |
| Square root | 56.026779 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 35 |
| Scientific notation | 3.139 × |
3139 in other forms
| Form | Value |
|---|---|
| In words | three thousand one hundred and thirty-nine |
| Roman numerals | MMMCXXXIX |
| Binary (base 2) | 110001000011 |
| Octal (base 8) | 6103 |
| Hexadecimal (base 16) | C43 |
| Base 3 | 11022021 |
| As time | 3139 seconds = 52 min 19 s |
Is 3139 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 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 3139 a prime number?
No. 3139 = 43 × 73, so it is divisible by 43.
What are the factors of 3139?
1, 43, 73, 3139.
What is 3139 in binary?
110001000011 (hexadecimal C43, octal 6103).
What is the square root of 3139?
About 56.0268.
What is 3139 in Roman numerals?
MMMCXXXIX.
Is 3139 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 3139?
3139 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 43 × 73, the product of two primes.