3² × 21991

Prime Factor Structure

Factorization String 3^2 × 21991

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 285,896

Proper Divisor Sum 87,977

Digit Sum / Digital Root 36 (Root: 9)

Adjacent Primes #197909 ← → #197921

1 3 9 21,991 65,973 197,919

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

197,919 593,758 296,879 890,638 445,319 1,335,958 667,979 2,003,938 1,001,969 3,005,908 1,502,954 751,477 2,254,432 1,127,216 563,608 281,804 140,902 70,451 211,354 105,677 317,032 158,516 79,258 39,629 118,888 59,444 29,722 14,861 44,584 22,292 11,146 5,573 16,720 8,360 4,180 2,090 1,045 3,136 1,568 784 392 196 98 49 148 74 37 112 56 28 14 7 22 11 34 17 52 26 13 40

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.