9169
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 9396
- Proper Divisor Sum (Aliquot Sum)
- 227
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8944
- Möbius Function
- 1
- Radical
- 9169
- 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
- 153
- 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
- Expansion of exp(sin(x)*cosh(x)).at n=10A009211
- Numbers k such that the continued fraction for sqrt(k) has period 59.at n=10A020398
- a(n) = (d(n)-r(n))/5, where d = A026043 and r is the periodic sequence with fundamental period (0,2,3,0,0).at n=48A026045
- Numbers n such that 225*2^n-1 is prime.at n=14A050864
- First number of height n in Recamán's sequence A005132.at n=16A064290
- Values of A005132(n) at which the ratio A005132(n)/n sets a new record.at n=11A064621
- a(n) is the unique positive integer m which has a self-conjugate partition whose parts are the first n primes.at n=36A067773
- Numbers m such that [A070080(m), A070081(m), A070082(m)] is a right integer triangle.at n=17A070136
- Least nontrivial multiple of the n-th prime beginning with 9.at n=39A078293
- Semiprimes in A054556.at n=14A113693
- Number of n X n binary arrays with all 1's connected only in a 3 X 3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.at n=6A146030
- Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.at n=14A146032
- Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.at n=15A146032
- Sum of all numbers from n to n-th prime.at n=33A161624
- Semiprimes p such that next semiprime after p is p + 10.at n=32A217030
- Numbers n such that n!3 + 3^2 is prime.at n=38A247865
- Numbers n such that the decimal number concat(6,n) is a square.at n=24A273361
- Sum of the sixth largest parts of the partitions of n into 9 squarefree parts.at n=54A326527
- G.f. A(x) satisfies 1 + 5*A(x) = Sum_{n>=0} (x + 4*A(x)^n)^n.at n=6A380064