643,376

2⁴ × 79 × 509

Prime Factor Structure

Factorization String 2^4 × 79 × 509

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 20

Divisor Sum (σ) 1,264,800

Proper Divisor Sum 621,424

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #643373 ← → #643403

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

643,376 321,688 160,844 80,422 40,211 120,634 60,317 180,952 90,476 45,238 22,619 67,858 33,929 101,788 50,894 25,447 76,342 38,171 114,514 57,257 171,772 85,886 42,943 128,830 64,415 193,246 96,623 289,870 144,935 434,806 217,403 652,210 326,105 978,316 489,158 244,579 733,738 366,869 1,100,608 550,304 275,152 137,576 68,788 34,394 17,197 51,592 25,796 12,898 6,449 19,348 9,674 4,837 14,512 7,256 3,628 1,814 907 2,722 1,361 4,084

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