8067
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 10760
- Proper Divisor Sum (Aliquot Sum)
- 2693
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5376
- Möbius Function
- 1
- Radical
- 8067
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 70
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 89.at n=12A031587
- Numbers whose base-6 representation has exactly 6 runs.at n=27A043614
- Next-to-smallest k such that 2^(2^n) - k is prime.at n=11A058221
- Minimal m such that n^n-m and n^n+m are both primes, or -1 if there is no such m.at n=20A075468
- Number of fusenes with 22 hexagons, C_(2v) symmetry and containing n carbon atoms.at n=13A123288
- a(n) is the number of integer lattice points inside the right triangle with legs 3n and 4n (and hypotenuse 5n).at n=36A126587
- Number of lines through at least 2 points of a 5 X n grid of points.at n=38A160845
- Monotonic ordering of nonnegative differences 2^i-5^j, for 40>=i>=0, j>=0.at n=41A192114
- Table read by antidiagonals of numbers of form (2^n -1)*2^(m+2) + 3 where n>=1, m>=1.at n=50A224380
- Numbers k such that k, k+1, k+2, and k+3 are not divisible by any of their nonzero digits.at n=44A244358
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 313", based on the 5-celled von Neumann neighborhood.at n=24A287607
- Numbers k such that 12*13^k - 1 is prime.at n=15A297348
- Numbers k such that 417*2^k+1 is prime.at n=41A323108
- a(n) is the first occurrence of a composite number whose factorization without exponents contains exactly n circular loops (i.e., loops in digits 0, 6, 8, 9) on each side of the equals sign.at n=3A329542
- Number of ways to write n as an ordered sum of 6 nonprime numbers.at n=30A341483
- Number of integer partitions of n with weighted alternating sum 0.at n=53A363532
- a(n) = Sum_{j=1..n} Sum_{k=1..n} phi(2*j*k) / phi(k).at n=22A372664
- Gaston Tarry's 1905 trimagic square of order 128, read by rows.at n=23A381002