3² × 13 × 23 × 239

Prime Factor Structure

Factorization String 3^2 × 13 × 23 × 239

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 1,048,320

Proper Divisor Sum 405,171

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #643129 ← → #643183

1 3 9 13 23 39 69 117 207 239 299 717 897 2,151 2,691 3,107 5,497 9,321 16,491 27,963 49,473 71,461 214,383 643,149

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

643,149 1,929,448 964,724 482,362 241,181 723,544 361,772 180,886 90,443 271,330 135,665 406,996 203,498 101,749 305,248 152,624 76,312 38,156 19,078 9,539 28,618 14,309 42,928 21,464 10,732 5,366 2,683 8,050 4,025 12,076 6,038 3,019 9,058 4,529 13,588 6,794 3,397 10,192 5,096 2,548 1,274 637 1,912 956 478 239 718 359 1,078 539 1,618 809 2,428 1,214 607 1,822 911 2,734 1,367 4,102

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