3653
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3948
- Proper Divisor Sum (Aliquot Sum)
- 295
- 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
- 3360
- Möbius Function
- 1
- Radical
- 3653
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 131
- 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
- Crystal ball sequence for 5-dimensional cubic lattice.at n=6A001847
- Crystal ball sequence for 6-dimensional cubic lattice.at n=5A001848
- a(n) = Sum_{k=0..n-1} binomial(n,k+1) * binomial(n+k,k).at n=6A002002
- a(n) = n*(5*n^2 - 2)/3.at n=13A004466
- Square array of Delannoy numbers D(i,j) (i >= 0, j >= 0) read by antidiagonals.at n=71A008288
- Square array of Delannoy numbers D(i,j) (i >= 0, j >= 0) read by antidiagonals.at n=72A008288
- Coordination sequence T1 for Zeolite Code VNI.at n=37A009907
- Coordination sequence for MgNi2, Position Mg2.at n=15A009935
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFS = ZSM-57 H1.5[Al1.5Si34.5O72] starting with a T8 atom.at n=11A019175
- Pseudoprimes to base 53.at n=37A020181
- Numbers k such that the continued fraction for sqrt(k) has period 15.at n=21A020354
- a(n) = s(1)*s(n) + s(2)*s(n-1) + ... + s(k)*s(n+1-k), where k = floor((n+1)/2), s = (Fibonacci numbers).at n=14A024458
- a(n) = T([n/2],[(n+1)/2]), where T = Delannoy triangle (A008288).at n=11A026003
- a(n) = Sum{T(n,k)*T(n,2n-k)}, 0<=k<=n-1, T given by A027926.at n=7A027991
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 6.at n=12A031419
- Number of days in n years (n=2 is the first leap year).at n=9A033173
- Number of days in n years (n=1 is the first leap year).at n=9A033174
- Decimal part of cube root of a(n) starts with 4: first term of runs.at n=14A034130
- Coordination sequence T13 for Zeolite Code STT.at n=40A038420
- Numbers whose base-3 representation contains exactly four 0's and three 2's.at n=35A045012