λ
Sequence Observatory

7,857,947

7857947
Deficient Odd Prime

Starting at 7,857,947, the Collatz iteration reaches 1 after 323 steps. The first transition is 23573842; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 7857947
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 7,857,948
Proper Divisor Sum 1
Digit Sum / Digital Root 47 (Root: 2)
Adjacent Primes #7857943 ← → #7857953

Radix Representation

Decimal 7857947
Binary 11101111110011100011011 (23 bits)
Octal 0o35763433
Hexadecimal 0x77E71B

Divisor Catalog (2)

Collatz Trajectory (323 steps to reach 1)

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

7,857,947 23,573,842 11,786,921 35,360,764 17,680,382 8,840,191 26,520,574 13,260,287 39,780,862 19,890,431 59,671,294 29,835,647 89,506,942 44,753,471 134,260,414 67,130,207 201,390,622 100,695,311 302,085,934 151,042,967 453,128,902 226,564,451 679,693,354 339,846,677 1,019,540,032 509,770,016 254,885,008 127,442,504 63,721,252 31,860,626 15,930,313 47,790,940 23,895,470 11,947,735 35,843,206 17,921,603 53,764,810 26,882,405 80,647,216 40,323,608 20,161,804 10,080,902 5,040,451 15,121,354 7,560,677 22,682,032 11,341,016 5,670,508 2,835,254 1,417,627 4,252,882 2,126,441 6,379,324 3,189,662 1,594,831 4,784,494 2,392,247 7,176,742 3,588,371 10,765,114

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