11023
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 7
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11248
- Proper Divisor Sum (Aliquot Sum)
- 225
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10800
- Möbius Function
- 1
- Radical
- 11023
- 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
- 130
- 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
- Divisors of 2^45 - 1.at n=12A003550
- An "extremely strange sequence": a(n+1) = [ A*a(n)+B ]/p^r, where p^r is the highest power of p dividing [ A*a(n)+B ] and p=2, A=4.001, B=1.2.at n=38A028948
- a(n) = floor(exp(18/23) * n!).at n=6A030811
- Positive numbers having the same set of digits in base 6 and base 10.at n=26A037437
- Denominators of continued fraction convergents to sqrt(312).at n=8A041589
- Counterbalanced numbers: Composite numbers k such that phi(k)/(sigma(k)-k) is an integer.at n=15A055940
- Number of n-bead necklace structures using a maximum of six different colored beads.at n=9A056294
- Coefficients of monic primitive irreducible polynomials over GF(5) listed in lexicographic order.at n=35A058950
- Products of two primes that are not Chen primes.at n=31A115719
- Numbers beginning with a vowel in French.at n=25A118557
- A123896 sorted and duplicates removed.at n=36A123902
- Cyclops semiprimes.at n=31A160725
- a(n) = A160799(n)/4.at n=34A160807
- Numbers n with property that there is a different number m such that the lunar squares n*n and m*m are the same.at n=11A181319
- G.f. A(x) satisfies A(x) = 1 + Sum_{n>=1} A(x)^n * x^n*(1 + x^n)^n.at n=9A194691
- Number of second differences of arrays of length 4 of numbers in 0..n.at n=32A228219
- Cyclops numbers whose squares are cyclops numbers.at n=5A239827
- Partial sums of A253086.at n=47A255150
- a(n) = 9*n^2 + 18*n + 7.at n=34A259055
- Smallest number of each digital type.at n=69A266946