The number 39977
39977 is a composite number with 4 divisors. Its prime factorisation is 7 × 5711. Divisors (4): 1, 7, 5711, 39977.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 39977: a semiprime: 7 × 5711, the product of two primes.
- 2
39977 is composite. Its prime factorisation is
- 3
The divisors add up to 45696; without 39977 itself that is 5719, so 39977 is deficient (5719 is less than 39977). Euler's totient φ(39977) = 34260 numbers up to 39977 share no factor with it.
- 4
The digits of 39977 add up to 35, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 39977 = 7 \times 5711 \]
39977 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 45696 |
| Euler totient φ(n) | 34260 |
| Square | 1598160529 |
| Cube | 63889663467833 |
| Square root | 199.942492 |
| Digit sum / digital root | 35 / 8 |
| Collatz steps to 1 | 75 |
| Scientific notation | 3.9977 × |
39977 in other forms
| Form | Value |
|---|---|
| In words | thirty-nine thousand nine hundred and seventy-seven |
| Binary (base 2) | 1001110000101001 |
| Octal (base 8) | 116051 |
| Hexadecimal (base 16) | 9C29 |
| Base 3 | 2000211122 |
| As time | 39977 seconds = 11 h 6 min 17 s |
Is 39977 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 2) | 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 (39977 ÷ 7 = 5711) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | 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 39977 a prime number?
No. 39977 = 7 × 5711, so it is divisible by 7.
What are the factors of 39977?
1, 7, 5711, 39977.
What is 39977 in binary?
1001110000101001 (hexadecimal 9C29, octal 116051).
What is the square root of 39977?
About 199.9425.
Is 39977 divisible by 3?
No. Its digits add up to 35, which is not a multiple of 3.
What is special about the number 39977?
39977 is a semiprime: 7 × 5711, the product of two primes.