8614
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13320
- Proper Divisor Sum (Aliquot Sum)
- 4706
- 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
- 4176
- Möbius Function
- -1
- Radical
- 8614
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 78
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- yes
- Odd
- no
Appears in sequences
- Even heptagonal numbers (A000566).at n=29A014640
- Pseudoprimes to base 75.at n=40A020203
- Numbers k such that the continued fraction for sqrt(k) has period 90.at n=16A020429
- 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 92.at n=14A031590
- a(n) = (2*n + 1)*(5*n + 1).at n=29A033571
- a(n) = (2*n-1)*(n^2 -n +6)/6.at n=29A049480
- a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i), array T as in A048149.at n=31A049714
- Numbers n such that digits of n and the prime factorization of n are distinct and nonrepeating.at n=30A057885
- Numbers k such that sopf(k)*nud(k) = pi(k), where sopf(k)=A008472, nud(k)=A034444 and pi(k)=A000720.at n=8A064015
- Number of compositions (ordered partitions) of n that are concave-down sequences.at n=50A070211
- Heptagonal numbers for which the digital root is also a heptagonal number.at n=28A117663
- Site series for first parallel moment of Kagome lattice.at n=12A120550
- Maximal length of rook tour on an n X n+1 board.at n=22A152132
- Maximal length of rook tour on an n X n+3 board.at n=21A152134
- Partial sums of [A080782^2].at n=28A164765
- Partial sums of A165271.at n=24A165273
- Number of distinct values of the sum of i^2 over 9 realizations of i in 0..n.at n=31A225276
- Smallest even pseudoprime (>2n+1) in base 2n+1.at n=37A253233
- Numbers n such that the Collatz iterations for n and n + 1 have the same length (A078417) but do not meet a certain condition. (See comments.)at n=8A274410
- Number of aperiodic necklaces (Lyndon words) with k<=5 black beads and n-k white beads.at n=33A277629