8825
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 10974
- Proper Divisor Sum (Aliquot Sum)
- 2149
- 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
- 7040
- Möbius Function
- 0
- Radical
- 1765
- Omega Function (Ω)
- 3
- 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
- 140
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Molien series for A_9.at n=37A008632
- Numbers k such that the continued fraction for sqrt(k) has period 25.at n=29A020364
- a(n) = (d(n)-r(n))/2, where d = A026037 and r is the periodic sequence with fundamental period (1,0,0,1).at n=35A026038
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 9.at n=18A031422
- Composite numbers whose prime factors contain no digits other than 3 and 5.at n=44A036315
- Numbers m such that the factorizations of m..m+3 have the same number of primes (including multiplicities).at n=38A045940
- Odd numbers with only palindromic prime factors whose sum is palindromic (counted with multiplicity).at n=29A046356
- Digitally balanced numbers in both bases 2 and 3.at n=21A049361
- Solutions to sigma(x)+2=sigma(x+2) other than the smaller of twin primes.at n=2A050507
- Number of fullerenes with 2n vertices (or carbon atoms), counting enantiomorphic pairs as distinct.at n=23A057210
- Numbers k such that A065608(k) = A065608(k+2).at n=10A065064
- Number of simple 4-regular 4-edge-connected but not 3-connected plane graphs on n nodes.at n=14A078672
- Numbers n such that n, n+1, n+2 and n+3 are products of exactly 3 primes.at n=36A124057
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 0, 1), (1, -1, -1), (1, 1, -1)}.at n=9A148404
- a(n) = n*(14*n + 3).at n=25A195025
- Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=2|x-y|+2|y-z|.at n=33A212576
- 20k^2-20k-5 interleaved with 20k^2+5 for k=>0.at n=43A216876
- Products of 3 evil primes (A027699) p,q,r, such that numbers p*q, p*r, q*r, and p*q*r are odious (A000069).at n=9A230353
- Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal.at n=2A236803
- Number of (n+1) X (3+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2 X 2 subblock equal.at n=1A236804