11673
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 16874
- Proper Divisor Sum (Aliquot Sum)
- 5201
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7776
- Möbius Function
- 0
- Radical
- 3891
- Omega Function (Ω)
- 3
- 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
- 81
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- a(n) = position of 3*n^3 in A003072.at n=32A024970
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 24.at n=8A031702
- Numbers k such that k + the reversal of k is a square.at n=41A061230
- Positive numbers whose product of digits is 7 times their sum.at n=27A062384
- Group the composite numbers so that the sum of the n-th group is a multiple of the n-th prime: (4), (6), (8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22), (24, 25), (26, 27, 28, 30, 32), (33, 34, ...), ... Sequence gives the group sum divided by n-th prime for the n-th group.at n=47A074127
- Numbers n such that n and n+2 are of the form p^2*q where p and q are distinct primes.at n=37A074173
- Numbers k such that phi(k) is a perfect 5th power.at n=31A078165
- Number of 3 X n 0-1 matrices which have n+2 1's and have no zero rows or zero columns.at n=5A084485
- Numbers n such that 6*10^n + 4*R_n + 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=8A103037
- a(n) = 6*a(n-1) - 3*a(n-2), a(0)=2, a(1)=13.at n=5A109112
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1111 pattern in any orientation.at n=9A146619
- 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, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.at n=7A150803
- a(n) = 81*n^2 + 9.at n=11A157888
- Half the number of (n+1) X 3 0..2 arrays with every 2 X 2 subblock having two or four distinct clockwise edge differences.at n=4A209505
- Half the number of (n+1)X6 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=1A209508
- T(n,k)=Half the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=16A209511
- T(n,k)=Half the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=19A209511
- Number of partitions of n such that the number of parts having multiplicity 1 is a part or the number of distinct parts is a part.at n=35A241446
- Numbers k such that k and k + 1 are both binary Smith numbers (A278909).at n=40A331464
- Numbers k such that k and k+2 both have exactly 6 divisors.at n=39A356743