9119
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 9960
- Proper Divisor Sum (Aliquot Sum)
- 841
- 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
- 8280
- Möbius Function
- 1
- Radical
- 9119
- 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
- 65
- 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
- Number of symmetric plane partitions of n.at n=34A005987
- Coordination sequence for sigma-CrFe, Position Xa.at n=24A009962
- Number of 2's in n-th term of A007651.at n=36A022467
- Expansion of Product_{m >= 1} (1-m*q^m)^11.at n=10A022671
- Palindromes of form n^2 + 3*n + 1.at n=9A028349
- Palindromes whose digits do not appear in previous term.at n=36A030285
- Palindromic Super-2 Numbers.at n=10A032750
- Denominators of continued fraction convergents to sqrt(971).at n=9A042879
- Palindromes that start with 9.at n=13A043044
- Palindromes with exactly 2 prime factors (counted with multiplicity).at n=47A046328
- Palindromes with exactly 2 distinct prime factors.at n=44A046392
- Geometric mean of the digits = 3. In other words, the product of the digits is = 3^k where k is the number of digits.at n=24A061427
- Numbers, not composed of the same digits, such that the geometric and arithmetic means of their decimal digits are integers.at n=40A067452
- Concatenation of R(n) (A004086) and n, omitting leading 0's.at n=18A071273
- (p^2-5)/4 for odd primes p.at n=41A074367
- Palindromic odd squarefree numbers with an even number of distinct prime factors.at n=38A075810
- Palindromic odd numbers with exactly 2 prime factors (counted with multiplicity).at n=36A075812
- Let p and q be two prime numbers, not necessarily consecutive, such that q - p = 2n; a(n) is the number of distinct partitions of 2n into even numbers so that each partition corresponds to a consecutive prime difference pattern (k-tuple) and p<=A000230(n). Multiple occurrences of a partition are not counted.at n=46A079024
- Palindromes that cannot be expressed as the difference of two palindromes.at n=1A083142
- Palindromes divisible by the number formed by their internal digits.at n=50A088287