8698
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 31
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 13050
- Proper Divisor Sum (Aliquot Sum)
- 4352
- 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
- 4348
- Möbius Function
- 1
- Radical
- 8698
- 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
- 140
- 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
- yes
- Odd
- no
Appears in sequences
- Strobogrammatic numbers: the same upside down.at n=31A000787
- Eleven iterations of Reverse and Add are needed to reach a palindrome.at n=26A015992
- Numbers k such that the continued fraction for sqrt(k) has period 55.at n=9A020394
- a(n) = floor( Sum_{1 <= i < j <= n} ((sqrt(j)-sqrt(i))^3) ).at n=36A025197
- Numbers k such that k^2 is palindromic in base 8.at n=35A029805
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 26.at n=3A031614
- Number of 6-ary rooted trees with n nodes and height exactly 9.at n=15A036647
- Denominators of continued fraction convergents to sqrt(696).at n=10A042339
- a(n) = A047881(n) / 2.at n=35A047882
- Numbers which need eleven 'Reverse and Add' steps to reach a palindrome.at n=24A065216
- a(1)=1; a(n) = a(n-1) + [sum of all decimal digits present so far in the sequence].at n=39A072921
- Numbers that look the same when printed upside down.at n=16A111156
- Number of 2 X 2 singular integer matrices with entries from {2,...,n}.at n=46A134978
- floor((log(4)/log(3))^n).at n=39A140881
- 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, 1, -1), (-1, 1, 1), (1, 0, 0), (1, 1, 1)}.at n=7A150708
- a(n) = p(n)*p(n+2) - 3*p(n+1), where p(n) is the n-th prime.at n=23A152528
- Positions of zeros in A165582.at n=47A165583
- Augmentation of the Fibonacci triangle A058071. See Comments.at n=25A193595
- Positive integers c in primitive (1/4)-Pythagorean triples (a,b,c) satisfying a<=b, in order of increasing a and then increasing b.at n=46A196264
- Expansion of Product_{i>=1} (1 + x^(2*i + 1))/(1 - x^(2*i + 1)).at n=54A207944