3523
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3808
- Proper Divisor Sum (Aliquot Sum)
- 285
- 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
- 3240
- Möbius Function
- 1
- Radical
- 3523
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 105
- 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 partitions of floor(5n/2) into n nonnegative integers each no more than 5.at n=26A001975
- Class numbers associated with terms of A001986.at n=24A001987
- Class numbers associated with terms of A001986.at n=23A001987
- Class numbers associated with terms of A001986.at n=25A001987
- Coordination sequence T1 for Zeolite Code LTN.at n=41A008140
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFI = ZSM-5 Nan[AlnSi96-nO192] starting with a T3 atom.at n=11A019160
- Pseudoprimes to base 29.at n=27A020157
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=39A020381
- Numbers with exactly 7 1's in their ternary expansion.at n=13A023698
- Numbers k such that 245*2^k+1 is prime.at n=19A032499
- Numbers having three 4's in base 9.at n=26A043471
- Numbers k such that the string 4,4 occurs in the base 9 representation of k but not of k-1.at n=43A044291
- Numbers whose base-3 representation contains no 0's and exactly one 2.at n=33A044990
- Discriminants of imaginary quadratic fields with class number 6 (negated).at n=49A046003
- Numerator sequence of mean length of certain stackings of n+1 squares on a double staircase.at n=11A055245
- Number of reversible string structures with n beads using exactly five different colors.at n=8A056329
- Number of primitive (aperiodic) reversible string structures with n beads using exactly five different colors.at n=8A056339
- a(n+1) = a(n)-th composite and a(1) = 13.at n=23A059408
- Number of orbits of the group of units of Z/(n) acting naturally on the 4-subsets of Z/(n).at n=35A063381
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 11.at n=11A064909