The number 43979
43979 is a composite number with 8 divisors. Its prime factorisation is 13 × 17 × 199. Divisors (8): 1, 13, 17, 199, 221, 2587, 3383, 43979.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43979: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
43979 is composite. Its prime factorisation is
- 3
The divisors add up to 50400; without 43979 itself that is 6421, so 43979 is deficient (6421 is less than 43979). Euler's totient φ(43979) = 38016 numbers up to 43979 share no factor with it.
- 4
The digits of 43979 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 70 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43979 = 13 \times 17 \times 199 \]
43979 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 50400 |
| Euler totient φ(n) | 38016 |
| Square | 1934152441 |
| Cube | 85062090202739 |
| Square root | 209.711707 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 70 |
| Scientific notation | 4.3979 × |
43979 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand nine hundred and seventy-nine |
| Binary (base 2) | 1010101111001011 |
| Octal (base 8) | 125713 |
| Hexadecimal (base 16) | ABCB |
| Base 3 | 2020022212 |
| As time | 43979 seconds = 12 h 12 min 59 s |
Is 43979 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 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 5) | 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 43979 a prime number?
No. 43979 = 13 × 17 × 199, so it is divisible by 13.
What are the factors of 43979?
1, 13, 17, 199, 221, 2587, 3383, 43979.
What is 43979 in binary?
1010101111001011 (hexadecimal ABCB, octal 125713).
What is the square root of 43979?
About 209.7117.
Is 43979 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 43979?
43979 is a happy number: repeatedly adding the squares of its digits reaches 1.