λ
Modular Archive

201,689

139 × 1451
Deficient Odd Composite

Prime Factor Structure

Factorization String 139 × 1451
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 203,280
Proper Divisor Sum 1,591
Digit Sum / Digital Root 26 (Root: 8)
Adjacent Primes #201683 ← → #201701

Radix Representation

Decimal 201689
Binary 110001001111011001 (18 bits)
Octal 0o611731
Hexadecimal 0x313D9

Divisor Catalog (4)

Collatz Trajectory (67 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

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