6695
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 8736
- Proper Divisor Sum (Aliquot Sum)
- 2041
- 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
- 4896
- Möbius Function
- -1
- Radical
- 6695
- 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
- 44
- 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
- Number of partitions of 3n-1 into n nonnegative integers each no more than 6.at n=21A001978
- Numbers that are the sum of 10 positive 7th powers.at n=31A003377
- Place where n-th 1 occurs in A023125.at n=42A022787
- a(n) = (d(n)-r(n))/2, where d = A026060 and r is the periodic sequence with fundamental period (1,0,0,0).at n=34A026061
- Numbers having four 5's in base 6.at n=5A043392
- Number of Fibonacci numbers F(k), k <= 10^n, whose initial digit is 6.at n=4A073562
- a(n)=A089551(n)/2.at n=37A089558
- Numbers whose set of base 6 digits is {0,5}.at n=23A097252
- Least positive integer that can be represented as sum of a semiprime and a square in exactly n ways.at n=45A101181
- Numbers k such that sigma(k)*k is a triangular number.at n=22A115909
- Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n having k UU's starting at level 0 (i.e., doublerises at level 1; n >= 0, 0 <= k <= floor(n/2)).at n=33A129168
- 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, 0, 1), (-1, 1, 0), (0, -1, 1), (0, 1, 1), (1, 0, -1)}.at n=8A148983
- Multiples of 13 whose reversal + 1 is also a multiple of 13.at n=34A166390
- a(n) = a(n-1) + a(n-2) + a(n-3) with a(0)=2, a(1)=1, a(2)=2.at n=15A214899
- G.f.: Sum_{n>=0} n! * x^n * Product_{k=1..n} (3 + k*x)/(1 + 3*k*x + k^2*x^2).at n=6A221973
- Number of Dyck paths of semilength n having exactly seven (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=U=(1,1) and 0=D=(1,-1).at n=8A243776
- Rank of terms of A250005 whose value is not constrained by the iterated cubefree rule.at n=29A250006
- Numbers in A259145 that are neither prime nor semiprime.at n=35A259172
- Records for the numbers of Pythagorean triples to which an integer belongs.at n=57A269929
- Increasingly larger (in absolute value) extrema of the Mertens function A002321 between subsequent zeros.at n=38A304242