649,139

563 × 1153

Starting at 649,139, the Collatz iteration reaches 1 after 92 steps. The first transition is 1947418; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 563 × 1153

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 650,856

Proper Divisor Sum 1,717

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #649123 ← → #649141

Radix Representation

Decimal	649139
Binary	10011110011110110011 (20 bits)
Octal	0o2363663
Hexadecimal	0x9E7B3

Divisor Catalog (4)

1 563 1,153 649,139

Collatz Trajectory (92 steps to reach 1)

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

649,139 1,947,418 973,709 2,921,128 1,460,564 730,282 365,141 1,095,424 547,712 273,856 136,928 68,464 34,232 17,116 8,558 4,279 12,838 6,419 19,258 9,629 28,888 14,444 7,222 3,611 10,834 5,417 16,252 8,126 4,063 12,190 6,095 18,286 9,143 27,430 13,715 41,146 20,573 61,720 30,860 15,430 7,715 23,146 11,573 34,720 17,360 8,680 4,340 2,170 1,085 3,256 1,628 814 407 1,222 611 1,834 917 2,752 1,376 688

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