1936
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
- 15
- Divisor Sum
- 4123
- Proper Divisor Sum (Aliquot Sum)
- 2187
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 880
- Möbius Function
- 0
- Radical
- 22
- Omega Function (Ω)
- 6
- 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
- yes
- 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
- 99
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- yes
- Achilles Number
- no
- Perfect Power
- yes
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Squares that are not the sum of 2 nonzero squares.at n=27A000548
- Expansion of e.g.f. (sin x + cos x)/cos 3x.at n=5A000810
- Hexanacci numbers: a(n+1) = a(n)+...+a(n-5) with a(0)=...=a(4)=0, a(5)=1.at n=17A001592
- Number of multigraphs with 4 nodes and n edges.at n=19A003082
- Numbers of the form 2^i * 11^j.at n=24A003596
- Number of Dyck paths of knight moves.at n=12A005221
- a(n) = (n+1)*(n^2+n+2)/2; g.f.: (1 + 2*x^2) / (1 - x)^4.at n=15A006000
- E.g.f.: (sin x + cos 2x) / cos 3x.at n=5A007286
- Expansion of f(f(x)), where f = x + x^2 + x^4 + x^8 + x^16 + ...at n=18A007801
- Product of the proper divisors of n.at n=43A007956
- Coordination sequence T1 for Zeolite Code AEL.at n=29A008004
- Coordination sequence T2 for Zeolite Code AEL.at n=29A008005
- Coordination sequence T1 for Zeolite Code ERI and OFF.at n=32A008093
- Coordination sequence T6 for Zeolite Code MFI.at n=28A008169
- a(n) = 2^(2n+3) - 2^n*(n+3).at n=5A008464
- Theta series of direct sum of f.c.c. and b.c.c. lattices.at n=51A008664
- Dates of accession of the Georges to the English throne.at n=5A008744
- Squares formed by concatenating other squares, not ending in 0.at n=9A009404
- Powers of 44.at n=2A009988
- Expansion of e.g.f.: exp(arcsin(arctan(x)))=1+x+1/2!*x^2-3/4!*x^4+4/5!*x^5+69/6!*x^6...at n=9A012087