1959
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2616
- Proper Divisor Sum (Aliquot Sum)
- 657
- 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
- 1304
- Möbius Function
- 1
- Radical
- 1959
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 81
- 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
- Mu-molecules in Mandelbrot set whose seeds have period n.at n=11A006876
- Numbers k such that Fibonacci(k) == -2 (mod k).at n=31A023163
- Convolution of odd numbers and A014306.at n=47A023661
- a(n) = sum of the numbers between the two n's in A026346.at n=29A026349
- T(2n,n+4), T given by A026758.at n=4A026875
- Numbers whose base-10 representation has 2 fewer 0's than 9's.at n=37A031500
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 13.at n=21A031511
- Lucky numbers with size of gaps equal to 14 (upper terms).at n=9A031897
- "DFK" (bracelet, size, unlabeled) transform of 2,1,1,1...at n=26A032215
- Numbers having two 9's in base 10.at n=41A043526
- Numbers k such that 5 and 9 occur juxtaposed in the base-10 representation of k but not of k+1.at n=38A044034
- Numbers k such that string 6,6 occurs in the base 7 representation of k but not of k-1.at n=39A044186
- Numbers k such that string 4,7 occurs in the base 8 representation of k but not of k-1.at n=34A044226
- Numbers n such that string 1,6 occurs in the base 9 representation of n but not of n-1.at n=27A044266
- Numbers n such that string 5,9 occurs in the base 10 representation of n but not of n-1.at n=21A044391
- Numbers n such that string 6,6 occurs in the base 7 representation of n but not of n+1.at n=39A044567
- Numbers n such that string 4,7 occurs in the base 8 representation of n but not of n+1.at n=34A044607
- Numbers n such that string 6,4 occurs in the base 8 representation of n but not of n+1.at n=33A044620
- Numbers k such that string 1,6 occurs in the base 9 representation of k but not of k+1.at n=27A044647
- Numbers n such that string 5,9 occurs in the base 10 representation of n but not of n+1.at n=21A044772