1698
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3408
- Proper Divisor Sum (Aliquot Sum)
- 1710
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 564
- Möbius Function
- -1
- Radical
- 1698
- 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
- 60
- 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
- yes
- Odd
- no
Appears in sequences
- Class numbers associated with terms of A001990.at n=22A001991
- Class numbers associated with terms of A001990.at n=19A001991
- Class numbers associated with terms of A001990.at n=20A001991
- Class numbers associated with terms of A001990.at n=23A001991
- Class numbers associated with terms of A001990.at n=21A001991
- Number of rooted trees with n vertices in which vertices at the same level have the same degree.at n=46A003238
- Numbers k such that k*3^k - 1 is prime.at n=11A006553
- Coordination sequence T2 for Zeolite Code AFY.at n=34A008030
- Coordination sequence T1 for Zeolite Code CAS.at n=25A008063
- Coordination sequence T4 for Zeolite Code STI.at n=28A008237
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BEA = Beta Na7[Al7Si57O128] starting with a T1 atom.at n=10A019067
- a(1) = 3; a(n+1) = a(n)-th composite.at n=20A022451
- Numbers k such that Fibonacci(k) == -8 (mod k).at n=23A023166
- Numbers with exactly 5 2's in their ternary expansion.at n=32A023703
- Index of 7^n within the sequence of the numbers of the form 3^i*7^j.at n=43A025721
- Index of 9^n within the sequence of the numbers of the form 5^i*9^j.at n=49A025735
- Number of labeled servers of dimension 3.at n=5A027390
- Numbers having period-14 7-digitized sequences.at n=32A031205
- 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 40.at n=8A031538
- Records for sum of proper divisors function A001065.at n=35A034091