The number 97642
97642 is a composite number with 4 divisors. Its prime factorisation is 2 × 48821. Divisors (4): 1, 2, 48821, 97642.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 97642: a semiprime: 2 × 48821, the product of two primes.
- 2
97642 is composite. Its prime factorisation is
- 3
The divisors add up to 146466; without 97642 itself that is 48824, so 97642 is deficient (48824 is less than 97642). Euler's totient φ(97642) = 48820 numbers up to 97642 share no factor with it.
- 4
The digits of 97642 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 159 steps to reach 1.
LaTeX source of the formulas on this page
\[ 97642 = 2 \times 48821 \]
97642 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 146466 |
| Euler totient φ(n) | 48820 |
| Square | 9533960164 |
| Cube | 930914938333288 |
| Square root | 312.477199 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 159 |
| Scientific notation | 9.7642 × |
97642 in other forms
| Form | Value |
|---|---|
| In words | ninety-seven thousand six hundred and forty-two |
| Binary (base 2) | 10111110101101010 |
| Octal (base 8) | 276552 |
| Hexadecimal (base 16) | 17D6A |
| Base 3 | 11221221101 |
| As time | 97642 seconds = 27 h 7 min 22 s |
Is 97642 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (97642 ÷ 2 = 48821) | 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 2) | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 2) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 97642 a prime number?
No. 97642 = 2 × 48821, so it is divisible by 2.
What are the factors of 97642?
1, 2, 48821, 97642.
What is 97642 in binary?
10111110101101010 (hexadecimal 17D6A, octal 276552).
What is the square root of 97642?
About 312.4772.
Is 97642 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 97642?
97642 is a semiprime: 2 × 48821, the product of two primes.