The number 48979
48979 is a composite number with 4 divisors. Its prime factorisation is 7 × 6997. Divisors (4): 1, 7, 6997, 48979.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 48979: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 7 × 6997, the product of two primes.
- 2
48979 is composite. Its prime factorisation is
- 3
The divisors add up to 55984; without 48979 itself that is 7005, so 48979 is deficient (7005 is less than 48979). Euler's totient φ(48979) = 41976 numbers up to 48979 share no factor with it.
- 4
The digits of 48979 add up to 37, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 127 steps to reach 1.
LaTeX source of the formulas on this page
\[ 48979 = 7 \times 6997 \]
48979 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 55984 |
| Euler totient φ(n) | 41976 |
| Square | 2398942441 |
| Cube | 117497801817739 |
| Square root | 221.311997 |
| Digit sum / digital root | 37 / 1 |
| Collatz steps to 1 | 127 |
| Scientific notation | 4.8979 × |
48979 in other forms
| Form | Value |
|---|---|
| In words | forty-eight thousand nine hundred and seventy-nine |
| Binary (base 2) | 1011111101010011 |
| Octal (base 8) | 137523 |
| Hexadecimal (base 16) | BF53 |
| Base 3 | 2111012001 |
| As time | 48979 seconds = 13 h 36 min 19 s |
Is 48979 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 | Yes (48979 ÷ 7 = 6997) | 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 48979 a prime number?
No. 48979 = 7 × 6997, so it is divisible by 7.
What are the factors of 48979?
1, 7, 6997, 48979.
What is 48979 in binary?
1011111101010011 (hexadecimal BF53, octal 137523).
What is the square root of 48979?
About 221.3120.
Is 48979 divisible by 3?
No. Its digits add up to 37, which is not a multiple of 3.
What is special about the number 48979?
48979 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 7 × 6997, the product of two primes.