1169
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1344
- Proper Divisor Sum (Aliquot Sum)
- 175
- 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
- 996
- Möbius Function
- 1
- Radical
- 1169
- 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
- 57
- 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
- Ramanujan's approximation to population of x^2 + y^2 <= 2^n.at n=12A000691
- Number of paraffins.at n=16A005998
- Binomial transform of primes.at n=7A007443
- Coordination sequence T1 for Zeolite Code LTA and RHO.at n=27A008137
- Coordination sequence T6 for Zeolite Code MEL.at n=22A008155
- Coordination sequence T1 for Zeolite Code MER.at n=25A008160
- Coordination sequence T2 for Zeolite Code MOR.at n=22A008183
- Coordination sequence T1 for Zeolite Code PAU.at n=25A008219
- Coordination sequence T6 for Zeolite Code PAU.at n=25A008224
- Coefficients in expansion of Euler's constant gamma as Sum_{n>=1} a(n)/(n*n!*(n+1)!), as found by greedy algorithm.at n=48A009929
- Triangle of multi-edge stars with n edges by cyclotomic index.at n=58A010358
- a(n) = floor( n*(n-1)*(n-2)/28 ).at n=33A011910
- Six iterations of Reverse and Add are needed to reach a palindrome.at n=18A015984
- Values of n for which exp(Pi*sqrt(n)) is very close to an integer.at n=41A019296
- Numbers k such that the continued fraction for sqrt(k) has period 28.at n=13A020367
- a(n) = [ a(n-1)/a(1) ] + [ a(n-2)/a(2) ] + ... + [ a(1)/a(n-1) ], for n >= 3.at n=16A022864
- Numbers k such that Fib(k) == -13 (mod k).at n=10A023167
- a(n) = [ (2nd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+1 positive integers congruent to 2 mod 3}.at n=39A024398
- Numbers that are the sum of 3 nonzero squares in 10 or more ways.at n=28A025338
- Numbers that are the sum of 3 distinct nonzero squares in 9 or more ways.at n=31A025355