3387
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4520
- Proper Divisor Sum (Aliquot Sum)
- 1133
- 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
- 2256
- Möbius Function
- 1
- Radical
- 3387
- 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
- 43
- 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 different keys with n cuts, depths between 1 and 7 and depth difference at most 1 between adjacent cut depths.at n=7A002714
- Coordination sequence T1 for Zeolite Code AEI.at n=44A008001
- Coordination sequence T2 for Zeolite Code MTW.at n=38A008197
- Coordination sequence T1 for Zeolite Code SGT.at n=36A008229
- Convolution of natural numbers with Beatty sequence for tau^2 A001950.at n=18A023542
- a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 4.at n=24A025010
- Coordination sequence T1 for Zeolite Code CGS.at n=43A027365
- Least term in period of continued fraction for sqrt(n) is 5.at n=17A031429
- 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 19.at n=22A031517
- Number of partitions of n into parts not a multiple of 7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=29A035985
- Numbers n such that string 8,7 occurs in the base 10 representation of n but not of n-1.at n=36A044419
- Numbers k such that string 8,7 occurs in the base 10 representation of k but not of k+1.at n=36A044800
- Numbers having, in base 15, (sum of even run lengths)=(sum of odd run lengths).at n=11A044886
- Numbers whose base-5 representation contains exactly two 0's and three 2's.at n=7A045183
- Numbers k such that k and 3^k end with the same two digits.at n=33A067749
- Number of compositions (ordered partitions) of n that are concave-down sequences.at n=40A070211
- Number of partitions of n into squarefree parts.at n=34A073576
- Number of paths of length n-1 a king can take from one side of an n X n chessboard to the opposite side.at n=6A081113
- Numbers n such that n, n-1 and n-2 have the same prime signature.at n=40A086337
- Number of partitions of n having nonnegative even rank (the rank of a partition is the largest part minus the number of parts).at n=33A101709