λ
Sequence Observatory

196,991

196991
Deficient Odd Prime

Starting at 196,991, the Collatz iteration reaches 1 after 85 steps. The first transition is 590974; the starting value is odd with 2 positive divisors.

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Prime Factor Structure

Factorization String 196991
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 196,992
Proper Divisor Sum 1
Digit Sum / Digital Root 35 (Root: 8)
Adjacent Primes #196961 ← → #196993

Radix Representation

Decimal 196991
Binary 110000000101111111 (18 bits)
Octal 0o600577
Hexadecimal 0x3017F

Divisor Catalog (2)

Collatz Trajectory (85 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.

196,991 590,974 295,487 886,462 443,231

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