3893
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4140
- Proper Divisor Sum (Aliquot Sum)
- 247
- 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
- 3648
- Möbius Function
- 1
- Radical
- 3893
- 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
- 100
- 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
- Number of trivalent connected (or cubic) planar graphs with 2n nodes.at n=8A005964
- Number of steps to compute n-th prime in PRIMEGAME (slow version).at n=5A007547
- Coordination sequence T3 for Zeolite Code BRE.at n=41A008060
- Coordination sequence T3 for Zeolite Code HEU.at n=41A008118
- a(n) = floor(n*(n-1)*(n-2)/13).at n=38A011895
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEP = Melanophlogite [Si46O92].qR starting with a T2 atom.at n=11A019156
- a(n) = n*(27*n - 1)/2.at n=17A022284
- Fibonacci sequence beginning 6, 13.at n=13A022388
- Shifts left under "BIJ" (reversible, indistinct, labeled) transform.at n=6A032116
- Positive numbers having the same set of digits in base 6 and base 9.at n=24A037436
- Denominators of continued fraction convergents to sqrt(545).at n=6A042043
- Numbers whose base-5 representation contains exactly three 1's and two 3's.at n=19A045246
- Discriminants of real quadratic number fields K with class number 2 such that the Hilbert class field of K is K(sqrt(17)).at n=39A052479
- a(n) = T(n,n-4), array T as in A055801.at n=34A055804
- Coordination sequence T1 for Zeolite Code SAV.at n=47A057314
- Coordination sequence T2 for Zeolite Code SAV.at n=47A057315
- McKay-Thompson series of class 48A for Monster.at n=48A058691
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 8.at n=21A064906
- Triangle of numbers arising in recursive computation of A002212.at n=32A073149
- Numbers n not of the form i^2+(i+1)^2 such that there are integers a < b with a^2+(a+1)^2+...+(n-1)^2 = n^2+(n+1)^2+...+b^2.at n=12A094523