13 × 19 × 2591

Prime Factor Structure

Factorization String 13 × 19 × 2591

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 725,760

Proper Divisor Sum 85,783

Digit Sum / Digital Root 41 (Root: 5)

Adjacent Primes #639959 ← → #639983

1 13 19 247 2,591 33,683 49,229 639,977

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

639,977 1,919,932 959,966 479,983 1,439,950 719,975 2,159,926 1,079,963 3,239,890 1,619,945 4,859,836 2,429,918 1,214,959 3,644,878 1,822,439 5,467,318 2,733,659 8,200,978 4,100,489 12,301,468 6,150,734 3,075,367 9,226,102 4,613,051 13,839,154 6,919,577 20,758,732 10,379,366 5,189,683 15,569,050 7,784,525 23,353,576 11,676,788 5,838,394 2,919,197 8,757,592 4,378,796 2,189,398 1,094,699 3,284,098 1,642,049 4,926,148 2,463,074 1,231,537 3,694,612 1,847,306 923,653 2,770,960 1,385,480 692,740 346,370 173,185 519,556 259,778 129,889 389,668 194,834 97,417 292,252 146,126

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