1966
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2952
- Proper Divisor Sum (Aliquot Sum)
- 986
- 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
- 982
- Möbius Function
- 1
- Radical
- 1966
- 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
- 143
- Smith Number
- yes
- 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
- yes
- Odd
- no
Appears in sequences
- a(n)=least number m such that m-a(n-1)<>a(j)-a(k) for all j,k less than m; a(1)=1, a(2)=3.at n=42A004979
- Stopping times.at n=8A007177
- Coordination sequence T3 for Zeolite Code LOV.at n=30A008136
- Numbers k such that the continued fraction for sqrt(k) has period 60.at n=5A020399
- Fibonacci sequence beginning 5, 19.at n=11A022143
- Convolution of A001950 and A014306.at n=41A023669
- Position of n^2 + 5 in A000408.at n=48A024801
- Numbers that are the sum of 3 distinct nonzero squares in exactly 9 ways.at n=32A025347
- a(n) = Sum_{k=0..n} (k+1) * A026758(n, n-k).at n=8A027236
- 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 44.at n=3A031542
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=12A031792
- XOR-convolution of squares A000290 with themselves.at n=13A033460
- Coordination sequence T3 for Zeolite Code CFI.at n=29A033601
- Numbers n such that digit sum of n equals digit sum of 'juxtaposition' and 'sum' of its prime factors (counted with multiplicity).at n=36A036921
- Even composite numbers whose digit sum equals the digit sum of (sum of prime factors, counted with multiplicity).at n=44A036922
- Digit sum of composite even number equals digit sum of juxtaposition of its prime factors (counted with multiplicity).at n=46A036924
- Digit sum of 'even' number equals digit sum of 'sum' and 'juxtaposition' of its prime factors (counted with multiplicity).at n=22A036926
- a(n)=(s(n)+2)/5, where s(n)=n-th base 5 palindrome that starts with 3.at n=40A043052
- Numbers k such that string 0,6 occurs in the base 7 representation of k but not of k-1.at n=44A044144
- Numbers n such that string 5,6 occurs in the base 8 representation of n but not of n-1.at n=34A044233