10873
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11088
- Proper Divisor Sum (Aliquot Sum)
- 215
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10660
- Möbius Function
- 1
- Radical
- 10873
- 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
- Numbers k such that phi(k) | sigma_10(k).at n=17A015768
- Numbers such that ten iterations of Reverse and Add are needed to reach a palindrome.at n=21A015991
- Numbers which need ten 'Reverse and Add' steps to reach a palindrome.at n=20A065215
- Least k such that the distance from k^2 to closest prime = n or zero if no k exists.at n=55A079666
- n-th Fibonacci number minus n-th prime number.at n=20A100700
- Expansion of x*(1+2*x+3*x^2+4*x^3+4*x^4)/(1+x+x^2+x^3-x^5).at n=62A122520
- Number of length n binary sequences with at most 2 of every adjacent 6 bits set.at n=20A133523
- Number of binary words of length n containing at least one subword 10^{10}1 and no subwords 10^{i}1 with i<10.at n=56A143290
- Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + 3*x)/(1 - 3*x - 7*x^2).at n=6A179603
- The least nonsquare number s having exactly n twos in the periodic part of the continued fraction of sqrt(s).at n=29A206582
- Define sequence x(n) by x(1)=1, thereafter x(n) = (x(n-1)+n)/(1-n*x(n-1)); sequence gives denominator(x(n)).at n=10A220447
- Composites in base 10 that remain composite in exactly four bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.at n=5A256354
- Smallest odd number not of the form p + 2^k with p prime and k >= 0 that is divisible by the n-th prime.at n=30A276458
- Let G be the undirected graph with nodes {g_k, k > 0} such that for any k > 0, g_k is connected to g_{k+1} and g_{A064413(k)} is connected to g_{A064413(k+1)}; a(n) is the number of nodes at distance n from g_1.at n=31A339732