11189
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11424
- Proper Divisor Sum (Aliquot Sum)
- 235
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10956
- Möbius Function
- 1
- Radical
- 11189
- 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
- 68
- 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
- Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 22.at n=36A051963
- a(n) is the smallest k such that (k^5 + 1)/(n^5 + 1) is an integer > 1.at n=28A066020
- Expansion of (1-3*x+6*x^2-5*x^3+3*x^4-x^5)/(1-x)^6.at n=15A089830
- Base-2 logarithm of (n-th even superperfect number divided by 2^n).at n=22A134712
- The sums of pairs of adjacent terms are the odd palindromic primes in ascending order.at n=30A181884
- Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+511)^2 = y^2.at n=19A207078
- Number of compositions of n with no consecutive 2's.at n=15A239791
- Lexicographically earliest increasing sequence a, b, c, ... such that every partial product (1-x^a), (1-x^a)(1-x^b), (1-x^a)(1-x^b)(1-x^c), ... has coefficients -1, 0, 1 only.at n=21A274768
- Sum over all partitions of n of the number of distinct parts i of multiplicity i - 1.at n=38A277101
- Triangle read by rows: T(n,k) number of ways of partitioning the (n+5)-element multiset {1,1,1,1,1,1,2,3,...,n} into exactly k nonempty parts, n >= 0 and 1 <= k <= n + 5.at n=59A291120
- Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=10A302167
- One of the two successive approximations up to 3^n for the 3-adic integer sqrt(-1/2).at n=9A309477
- Numbers that are the sum of nine fourth powers in exactly eight ways.at n=34A345850
- Products of exactly two distinct primes in A090252, in order of appearance.at n=40A354160
- Products of exactly two distinct odd primes in A090252, in order of appearance.at n=38A354162
- Integers k for which A000594(k)^2 > 4 k^11, where A000594 is Ramanujan's tau function.at n=23A364087
- Consecutive states of the linear congruential pseudo-random number generator 172*s mod 30307 when started at s=1.at n=31A385032
- Indices where the cumulative sum of cos(2k+1)^(2k+1) reaches a record low value.at n=22A389560