209,887
209887
Deficient
Odd
Prime
209,887 factors as 209887. Its 2 positive divisors give a proper-divisor sum of 1, so this integer is deficient. The Collatz stopping time is 155 steps.
Resources
Prime Factor Structure
Factorization String
209887
Distinct Prime Factors
1
Square Status
No
Abundance Measure
Deficient
Analytical Properties
Total Divisors
2
Divisor Sum (σ)
209,888
Proper Divisor Sum
1
Digit Sum / Digital Root
34 (Root: 7)
Adjacent Primes
#209861 ← → #209917
Radix Representation
| Decimal | 209887 |
| Binary | 110011001111011111 (18 bits) |
| Octal | 0o631737 |
| Hexadecimal | 0x333DF |
Divisor Catalog (2)
Collatz Trajectory (155 steps to reach 1)
Iterative sequence n → n/2 (if even) or 3n+1 (if odd):
Showing the first 5 trajectory entries; the stopping-time total above is unchanged.