The number 49091
49091 is a composite number with 4 divisors. Its prime factorisation is 7 × 7013. Divisors (4): 1, 7, 7013, 49091.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 49091: a semiprime: 7 × 7013, the product of two primes.
- 2
49091 is composite. Its prime factorisation is
- 3
The divisors add up to 56112; without 49091 itself that is 7021, so 49091 is deficient (7021 is less than 49091). Euler's totient φ(49091) = 42072 numbers up to 49091 share no factor with it.
- 4
The digits of 49091 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 70 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49091 = 7 \times 7013 \]
49091 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56112 |
| Euler totient φ(n) | 42072 |
| Square | 2409926281 |
| Cube | 118305691060571 |
| Square root | 221.564889 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 70 |
| Scientific notation | 4.9091 × |
49091 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand and ninety-one |
| Binary (base 2) | 1011111111000011 |
| Octal (base 8) | 137703 |
| Hexadecimal (base 16) | BFC3 |
| Base 3 | 2111100012 |
| As time | 49091 seconds = 13 h 38 min 11 s |
Is 49091 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 1) | 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 | Yes (49091 ÷ 7 = 7013) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | 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 49091 a prime number?
No. 49091 = 7 × 7013, so it is divisible by 7.
What are the factors of 49091?
1, 7, 7013, 49091.
What is 49091 in binary?
1011111111000011 (hexadecimal BFC3, octal 137703).
What is the square root of 49091?
About 221.5649.
Is 49091 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 49091?
49091 is a semiprime: 7 × 7013, the product of two primes.