1168
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
- 3
Divisibility
- Divisor Count
- 10
- Divisor Sum
- 2294
- Proper Divisor Sum (Aliquot Sum)
- 1126
- 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
- 576
- Möbius Function
- 0
- Radical
- 146
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 119
- 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
- yes
- Odd
- no
Appears in sequences
- Related to representations as sums of Fibonacci numbers.at n=25A006133
- Moebius transform of triangular numbers.at n=50A007438
- Coordination sequence T1 for Zeolite Code AST.at n=25A008036
- Coordination sequence T1 for Zeolite Code DOH.at n=21A008078
- Coordination sequence T4 for Zeolite Code EMT.at n=28A008089
- Coordination sequence T7 for Zeolite Code MEL.at n=22A008156
- Coordination sequence T6 for Zeolite Code MFS.at n=21A008178
- Coordination sequence T4 for Zeolite Code MOR.at n=22A008185
- Coordination sequence T3 for Zeolite Code TON.at n=21A008243
- Coefficients in expansion of Euler's constant gamma as Sum_{n>=1} a(n)/(n*n!*(n+1)!), as found by greedy algorithm.at n=34A009929
- arctanh(arctan(arctanh(x)))=x+2/3!*x^3+32/5!*x^5+1168/7!*x^7+80768/9!*x^9...at n=3A012237
- From table of maximal epacts e(p) and corresponding primes p, for x_1=2, x_{m+1} = (x_m)^2+1; sequence gives e(p).at n=40A014423
- Numbers k such that phi(k) | sigma(k + 5).at n=41A015843
- Positive integers n such that 2^n == 2^7 (mod n).at n=39A015927
- Coordination sequence T3 for Zeolite Code TER.at n=23A016435
- Coordination sequence T7 for Zeolite Code TER.at n=23A016439
- Pseudoprimes to base 81.at n=43A020209
- Pisot sequence P(5,11), a(0)=5, a(1)=11, a(n+1) is the nearest integer to a(n)^2/a(n-1).at n=7A021008
- Index of 5^n within sequence of numbers of form 2^i * 5^j.at n=31A022334
- Fibonacci sequence beginning 2, 20.at n=10A022372