1109
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 1110
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 1108
- Möbius Function
- -1
- Radical
- 1109
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 18
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 186
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Smallest nonnegative number that is the sum of 3 squares in exactly n ways.at n=12A000437
- Smallest number that is the sum of 3 squares in at least n ways.at n=12A000451
- Moser-de Bruijn sequence: sums of distinct powers of 4.at n=47A000695
- Number of partitions of floor(7n/2)-1 into n nonnegative integers each no greater than 7.at n=11A001980
- a(n) = least value of m for which Liouville's function A002819(m) = -n.at n=37A002053
- Class 4+ primes (for definition see A005105).at n=16A005108
- Positions of remoteness 5 in Beans-Don't-Talk.at n=40A005697
- Prime self (or Colombian) numbers: primes not expressible as the sum of an integer and its digit sum.at n=23A006378
- Emirps (primes whose reversal is a different prime).at n=45A006567
- Primes with both 10 and -10 as primitive root.at n=34A007349
- Primes of the form 8k + 5.at n=48A007521
- Subtrees in rooted plane trees on n nodes.at n=5A007856
- Coordination sequence T6 for Zeolite Code MTW.at n=22A008201
- Molien series for 4-dimensional complex reflection group of order 7680 (in powers of x^4).at n=53A008669
- Coordination sequence T2 for Zeolite Code -WEN.at n=24A009863
- Coordination sequence T1 for Zeolite Code RTH.at n=23A009893
- Coordination sequence T2 for Zeolite Code VSV.at n=21A009915
- Numbers k such that sigma(k) + 8 = sigma(k+8).at n=42A015915
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite APD = AlPO4-D [Al16P16O64] starting from a T1 atom.at n=4A018980
- Primes with primitive root 8.at n=42A019338