3922
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6156
- Proper Divisor Sum (Aliquot Sum)
- 2234
- 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
- 1872
- Möbius Function
- -1
- Radical
- 3922
- Omega Function (Ω)
- 3
- 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
- 175
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Coordination sequence T1 for Zeolite Code ATV.at n=40A008043
- Coordination sequence T2 for Zeolite Code ATV.at n=40A008044
- Coordination sequence T2 for feldspar.at n=42A008255
- Coordination sequence for CaF2(1), F position.at n=21A009924
- Coordination sequence for CaF2(2), F position.at n=28A009925
- a(0) = 1, a(n) = 5*n^2 + 2 for n>0.at n=28A010001
- a(0) = 1, a(n) = 20*n^2 + 2 for n>0.at n=14A010010
- a(1) = 1, a(2) = 2, a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-2)*a(2) for n >= 3.at n=9A014431
- Coordination sequence T7 for Zeolite Code TER.at n=42A016439
- Numbers k such that the continued fraction for sqrt(k) has period 19.at n=26A020358
- Fibonacci sequence beginning 2, 26.at n=12A022375
- Coordination sequence T1 for Zeolite Code CGS.at n=46A027365
- "BHJ" (reversible, identity, labeled) transform of 2,2,2,2...at n=4A032076
- Coordination sequence T1 for Zeolite Code SFF.at n=41A038437
- Starting from generation 5 add previous and next term yielding generation 6.at n=30A048452
- Coordination sequence T2 for Zeolite Code SFE.at n=41A057318
- Numbers k such that 5*2^k - 7 is prime.at n=21A059749
- Numbers k > 1 such that, in base 3, k and k^2 contain the same digits in the same proportion.at n=33A061657
- Numbers k such that floor(Pi*k) is a square.at n=40A061812
- a(3) = 2, a(4) = 3; for n > 4, a(n) = {a(n-2)}+{a(n-1)}, where {a} means largest prime <= a.at n=17A065435