19² × 43²

Prime Factor Structure

Factorization String 19^2 × 43^2

Distinct Prime Factors 2

Square Status Yes (√667489 = 817)

Abundance Measure Deficient

Analytical Properties

Total Divisors 9

Divisor Sum (σ) 721,233

Proper Divisor Sum 53,744

Digit Sum / Digital Root 40 (Root: 4)

Adjacent Primes #667487 ← → #667501

1 19 43 361 817 1,849 15,523 35,131 667,489

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

667,489 2,002,468 1,001,234 500,617 1,501,852 750,926 375,463 1,126,390 563,195 1,689,586 844,793 2,534,380 1,267,190 633,595 1,900,786 950,393 2,851,180 1,425,590 712,795 2,138,386 1,069,193 3,207,580 1,603,790 801,895 2,405,686 1,202,843 3,608,530 1,804,265 5,412,796 2,706,398 1,353,199 4,059,598 2,029,799 6,089,398 3,044,699 9,134,098 4,567,049 13,701,148 6,850,574 3,425,287 10,275,862 5,137,931 15,413,794 7,706,897 23,120,692 11,560,346 5,780,173 17,340,520 8,670,260 4,335,130 2,167,565 6,502,696 3,251,348 1,625,674 812,837 2,438,512 1,219,256 609,628 304,814 152,407

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