9669
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 30
- Digital Root
- 3
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 14112
- Proper Divisor Sum (Aliquot Sum)
- 4443
- 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
- 5840
- Möbius Function
- -1
- Radical
- 9669
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 21
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Sum of fourth powers of first n odd numbers.at n=4A002309
- Expansion of Jacobi theta constant (theta_2/2)^12.at n=8A014787
- a(n) = [ 2nd elementary symmetric function of {log(k)} ], k = 2,3,...,n.at n=45A025202
- Palindromic Super-2 Numbers.at n=11A032750
- First location of palindrome a(n) in decimal expansion of Pi is palindromic.at n=20A038101
- Palindromes that start with 9.at n=18A043044
- Composite palindromes whose sum of prime factors is prime (counted with multiplicity).at n=34A046365
- Palindromes with exactly 3 distinct prime factors.at n=39A046393
- Palindromes expressible as the sum of 3 consecutive palindromes.at n=20A046498
- Largest palindrome using minimum number of digits with a digit sum = n.at n=30A070244
- Palindromic odd composite numbers that are the products of an odd number of distinct primes.at n=21A075808
- Palindromic odd numbers with exactly 3 prime factors (counted with multiplicity).at n=31A075814
- Palindromic odd composite numbers with an odd number of prime factors (counted with multiplicity).at n=34A075815
- Numbers n with property that n is not a power of 2 and the finite sequence n, f(n), f(f(n)), ...., 1 in the Collatz (or 3x + 1) problem contains exactly one prime. (The earliest "1" is meant.)at n=38A078440
- a(n) = ceiling(((1*n^0 + 1*n^1 + 2*n^2 + 4*n^3)/(1*n^0 + 2*n^1 + 1*n^2))^2).at n=25A085505
- All palindromes of length greater than 1 in the decimal expansion of e, ordered by the ending position of the palindrome. Multiple terms ending at the same position are ordered by the starting position of the palindrome.at n=18A099052
- Numbers of the concatenated form 9nn9.at n=6A102484
- Numbers k such that 2^(2*(k+1)) + 2^k + 1 is prime.at n=16A105182
- Numbers n such that googol - n is prime.at n=35A108251
- 3-almost primes with semiprime digits (digits 4, 6, 9 only).at n=25A111494