11199
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14936
- Proper Divisor Sum (Aliquot Sum)
- 3737
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7464
- Möbius Function
- 1
- Radical
- 11199
- 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
- 73
- Smith Number
- no
- 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
- no
- Odd
- yes
Appears in sequences
- 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 70.at n=33A031568
- Numbers whose base-4 representation contains exactly three 2's and four 3's.at n=1A045152
- a(n) = index of the triangular number A076971(n).at n=25A076972
- Numbers n such that 7*10^n-3 is prime.at n=19A103049
- Semiprimes (A001358) made of nontrivial runs of identical digits.at n=21A116063
- Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant.at n=15A117345
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.at n=7A150642
- Greatest number m such that the fractional part of (3/2)^A153662(n) <= 1/m.at n=5A153666
- a(n) = 400*n - 1.at n=27A158317
- a(n) = 28*n^2 - 1.at n=19A158554
- Numbers k such that the first 9 digits of the k-th Lucas number are 1-9 pandigital.at n=2A216489
- a(n) is the smallest k such that prime(k+i) = 1 (mod 6) for i = 0, 1,...,n-1.at n=7A247816
- Decimal representation of the middle column of the "Rule 129" elementary cellular automaton starting with a single ON (black) cell.at n=13A267444
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 515", based on the 5-celled von Neumann neighborhood.at n=22A272707
- Index of the first prime which starts a run of n consecutive primes all congruent to each other mod 3 (or mod 6).at n=7A276414
- Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 283", based on the 5-celled von Neumann neighborhood.at n=13A280530
- Numbers k with the property that the square root of the product of the digits of k is equal to the sum of the square roots of its digits.at n=20A281745
- Numbers using only digits 1 and 9.at n=33A284294
- Numbers that contain exactly one pair of identical digits x and a triple of identical digits y (x not equal y).at n=17A291312
- Lexicographically earliest sequence of distinct terms such that a(n) is divisible by five and only five digits of a(n+1).at n=39A308609