3099
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4136
- Proper Divisor Sum (Aliquot Sum)
- 1037
- 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
- 2064
- Möbius Function
- 1
- Radical
- 3099
- 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
- 136
- 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
- Number of series-reduced planted trees with n+9 nodes and 4 internal nodes.at n=18A001860
- Number of antichains in rooted plane trees on n nodes.at n=6A007852
- Coordination sequence T2 for Zeolite Code AFT.at n=42A008027
- Least k such that first k terms of A022300 contain n more 1's than 2's.at n=18A022302
- a(n) = position of n^2 + (n+1)^2 + (n+2)^2 in A004432.at n=34A024809
- Coordination sequence T2 for Zeolite Code CGS.at n=41A027366
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 55.at n=7A031553
- Lucky numbers with size of gaps equal to 10 (lower terms).at n=35A031892
- Offsets for the Atkin Partition Congruence theorem.at n=31A036492
- Coordination sequence T5 for Zeolite Code ESV.at n=37A038414
- The sequence e when b=[ 1,0,1,1,1,... ].at n=30A042953
- Base-5 palindromes that start with 4.at n=35A043009
- a(n)=(s(n)+5)/9, where s(n)=n-th base 9 palindrome that starts with 4.at n=40A043075
- Numbers having four 4's in base 5.at n=11A043368
- Numbers k such that string 3,3 occurs in the base 8 representation of k but not of k-1.at n=48A044214
- Numbers n such that string 9,9 occurs in the base 10 representation of n but not of n-1.at n=30A044431
- Numbers n such that string 0,9 occurs in the base 10 representation of n but not of n+1.at n=32A044722
- Numbers n such that string 3,0 occurs in the base 10 representation of n but not of n+1.at n=33A044743
- Numbers n such that string 9,9 occurs in the base 10 representation of n but not of n+1.at n=30A044812
- Nonprime numbers n such that n and n-reversed (<>n and no leading zeros) have the same number of prime factors and these prime factors (palindromes allowed here) are also reversals of each other.at n=38A050702