The number 61349
61349 is a composite number with 4 divisors. Its prime factorisation is 31 × 1979. Divisors (4): 1, 31, 1979, 61349.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 61349: a semiprime: 31 × 1979, the product of two primes.
- 2
61349 is composite. Its prime factorisation is
- 3
The divisors add up to 63360; without 61349 itself that is 2011, so 61349 is deficient (2011 is less than 61349). Euler's totient φ(61349) = 59340 numbers up to 61349 share no factor with it.
- 4
The digits of 61349 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 241 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61349 = 31 \times 1979 \]
61349 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63360 |
| Euler totient φ(n) | 59340 |
| Square | 3763699801 |
| Cube | 230899219091549 |
| Square root | 247.687303 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 241 |
| Scientific notation | 6.1349 × |
61349 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand three hundred and forty-nine |
| Binary (base 2) | 1110111110100101 |
| Octal (base 8) | 167645 |
| Hexadecimal (base 16) | EFA5 |
| Base 3 | 10010011012 |
| As time | 61349 seconds = 17 h 2 min 29 s |
Is 61349 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 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 5) | 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 2) | 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 61349 a prime number?
No. 61349 = 31 × 1979, so it is divisible by 31.
What are the factors of 61349?
1, 31, 1979, 61349.
What is 61349 in binary?
1110111110100101 (hexadecimal EFA5, octal 167645).
What is the square root of 61349?
About 247.6873.
Is 61349 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 61349?
61349 is a semiprime: 31 × 1979, the product of two primes.