2654
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3984
- Proper Divisor Sum (Aliquot Sum)
- 1330
- 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
- 1326
- Möbius Function
- 1
- Radical
- 2654
- 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
- 53
- 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
- Number of alkyls S C_{n+4} H_{2n+4} with n carbon atoms.at n=9A000650
- Number of (undirected) Hamiltonian paths in the n-ladder graph K_2 X P_n.at n=51A003682
- Numbers n such that n^32 + 1 is prime.at n=46A006315
- Coordination sequence T4 for Zeolite Code GOO.at n=35A008114
- Coordination sequence T2 for Zeolite Code HEU.at n=34A008117
- Coordination sequence T3 for Zeolite Code LOV.at n=35A008136
- Powers of fifth root of 6 rounded to nearest integer.at n=22A018130
- Powers of fifth root of 6 rounded up.at n=22A018131
- Ceiling of Gamma(n+3/11)/Gamma(3/11).at n=8A020102
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=7A020391
- 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 50.at n=13A031548
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 22 ones.at n=26A031790
- Denominators of continued fraction convergents to sqrt(314).at n=9A041593
- Numbers whose base-7 representation contains exactly three 1's.at n=40A043399
- Numbers k such that the string 6,8 occurs in the base 9 representation of k but not of k-1.at n=35A044313
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n-1.at n=29A044386
- Numbers n such that string 5,6 occurs in the base 9 representation of n but not of n+1.at n=36A044683
- Numbers n such that string 6,8 occurs in the base 9 representation of n but not of n+1.at n=35A044694
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n+1.at n=29A044767
- Becomes prime or 4 after exactly 7 iterations of f(x) = sum of prime factors of x.at n=25A048129