3611
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3792
- Proper Divisor Sum (Aliquot Sum)
- 181
- 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
- 3432
- Möbius Function
- 1
- Radical
- 3611
- 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
- 69
- 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
- Numbers that are the sum of 3 positive 5th powers.at n=25A003348
- a(n) = 1000*log(n) rounded to the nearest integer.at n=36A004241
- Cubes written in base 7.at n=10A004637
- Numbers that are the sum of at most 3 positive 5th powers.at n=44A004843
- Numerators of worst case for Engel expansion.at n=29A006539
- Coordination sequence T2 for Zeolite Code TON.at n=37A008242
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly five 1's.at n=33A020441
- Least m such that if r and s in {1/1, 1/4, 1/9,..., 1/n^2} satisfy r < s, then r < k/m < s for some integer k.at n=21A024827
- a(n) = least m such that if r and s in {1/2, 1/4, 1/6, ..., 1/2n} satisfy r < s, then r < k/m < (k+4)/m < s for some integer k.at n=19A024848
- a(1) = 7; a(n+1) = a(n)-th nonprime, where nonprimes begin at 0.at n=26A025002
- Number of partitions of n with equal nonzero number of parts congruent to each of 0, 3 and 4 (mod 5).at n=46A035587
- Numbers n such that string 1,1 occurs in the base 10 representation of n but not of n-1.at n=36A044343
- Numbers n such that string 1,1 occurs in the base 10 representation of n but not of n+1.at n=36A044724
- 3*n^2-2*n+6.at n=35A047915
- Numbers k such that 231*2^k-1 is prime.at n=35A050867
- Truncated triangular pyramid numbers: a(n) = (n-5)*(n^2 + 8*n - 66)/6.at n=22A051939
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 16.at n=33A051981
- Smallest semiprime p*q such that q >= p and q mod p = n.at n=19A064910
- Integers for which the periodic part of the continued fraction for the square root of n begins with 10.at n=35A065013
- Numbers that in base 2 need twelve 'Reverse and Add' steps to reach a palindrome.at n=18A066133