2943
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4400
- Proper Divisor Sum (Aliquot Sum)
- 1457
- 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
- 1944
- Möbius Function
- 0
- Radical
- 327
- Omega Function (Ω)
- 4
- 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
- 172
- 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
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of unrooted achiral trees with n nodes.at n=26A003244
- a(n) = n*(4*n+1).at n=27A007742
- Coordination sequence T4 for Zeolite Code DDR.at n=34A008074
- Coordination sequence T6 for Zeolite Code DDR.at n=34A008076
- Coordination sequence T3 for Zeolite Code FER.at n=33A008108
- Coordination sequence T1 for Zeolite Code MTW.at n=36A008196
- a(n) = floor( n*(n-1)*(n-2)/27 ).at n=44A011909
- Numbers k that divide s(k), where s(1)=1, s(j)=7*s(j-1)+j.at n=27A014854
- Numbers k such that k divides s(k), where s(1)=1, s(j)= s(j-1) + j*7^(j-1).at n=15A014948
- Integers k such that k divides 22^k - 1.at n=32A014959
- Odd numbers k that divide 25^k - 1.at n=33A014962
- Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among triples.at n=13A015656
- Coordination sequence T2 for Zeolite Code SAT.at n=39A027374
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 4.at n=39A031428
- Numbers whose base-4 representation has 4 fewer 0's than 3's.at n=23A031469
- Lucky numbers with size of gaps equal to 10 (lower terms).at n=32A031892
- Lucky numbers with size of gaps equal to 20 (upper terms).at n=2A031903
- Floor( 7*n^2/2 ).at n=29A032525
- a(n) = floor(n^3 / e).at n=20A032636
- Multiplicity of highest weight (or singular) vectors associated with character chi_64 of Monster module.at n=35A034452