3663
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 5928
- Proper Divisor Sum (Aliquot Sum)
- 2265
- 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
- 2160
- Möbius Function
- 0
- Radical
- 1221
- Omega Function (Ω)
- 4
- 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
- 69
- Smith Number
- yes
- 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
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Optimal cost of search tree for searching an ordered array of n elements with cost k of probing element k.at n=39A007077
- Coordination sequence T6 for Zeolite Code BOG.at n=43A008054
- Let j = | i - i_written_backwards |, k = j + j_written_backwards; then k is in this sequence.at n=27A008920
- Coordination sequence T2 for Zeolite Code RSN.at n=39A009886
- Numbers that are the sum of 4 positive cubes in 3 or more ways.at n=39A025407
- (d(n)-r(n))/5, where d = A006527 and r is the periodic sequence with fundamental period (4,1,4,0,1).at n=36A026036
- Palindromes of form k^2 + k + 3.at n=6A027715
- Divisors of 999999.at n=42A027892
- Numbers that are palindromic in bases 8 and 10.at n=15A029804
- Palindromic lucky numbers.at n=22A031161
- Lucky numbers that are both palindromic and nonprime.at n=17A031880
- a(n) = binomial(n+4,4)*(4*n+5)/5.at n=8A034263
- Nonsquarefree palindromes.at n=49A035132
- Number of partitions of n such that cn(3,5) <= cn(0,5) = cn(1,5) < cn(2,5) = cn(4,5).at n=69A036868
- Numbers whose sum of reciprocals of digits is the reciprocal of an integer.at n=39A037264
- Sum of reciprocals of digits = 1.at n=21A037268
- G.f.: 1/((1-x)*(1-x^2))^3.at n=16A038163
- Coordination sequence T2 for Zeolite Code AFN.at n=43A038402
- Base-8 palindromes that start with 7.at n=11A043027
- Base-10 palindromes that starts with 3.at n=18A043038