2,661,999

3 × 887333

2,661,999 has digital root 6. The neighboring primes are 2661991 and 2662027; its proper-divisor sum differs from the starting integer by -1,774,662.

Prime Factor Structure

Factorization String 3 × 887333

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Total Divisors 4

Divisor Sum (σ) 3,549,336

Proper Divisor Sum 887,337

Digit Sum / Digital Root 42 (Root: 6)

Adjacent Primes #2661991 ← → #2662027

1 3 887,333 2,661,999

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

2,661,999 7,985,998 3,992,999 11,978,998 5,989,499 17,968,498 8,984,249 26,952,748 13,476,374 6,738,187 20,214,562 10,107,281 30,321,844 15,160,922 7,580,461 22,741,384 11,370,692 5,685,346 2,842,673 8,528,020 4,264,010 2,132,005 6,396,016 3,198,008 1,599,004 799,502 399,751 1,199,254 599,627 1,798,882 899,441 2,698,324 1,349,162 674,581 2,023,744 1,011,872 505,936 252,968 126,484 63,242 31,621 94,864 47,432 23,716 11,858 5,929 17,788 8,894 4,447 13,342 6,671 20,014 10,007 30,022 15,011 45,034 22,517 67,552 33,776 16,888

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