2419
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2520
- Proper Divisor Sum (Aliquot Sum)
- 101
- 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
- 2320
- Möbius Function
- 1
- Radical
- 2419
- 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
- 58
- 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
- Coordination sequence T5 for Zeolite Code BOG.at n=35A008053
- Coordination sequence T4 for Zeolite Code MTT.at n=30A008192
- Powers of fourth root of 17 rounded down.at n=11A018093
- Coordination sequence T3 for Zeolite Code CGF.at n=34A019453
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = (composite numbers).at n=15A025091
- a(n) = (d(n)-r(n))/5, where d = A026063 and r is the periodic sequence with fundamental period (1,4,0,0,0).at n=31A026065
- Lucky numbers with size of gaps equal to 8 (lower terms).at n=25A031890
- Numbers whose set of base-13 digits is {1,4}.at n=16A032825
- Coordination sequence T1 for Zeolite Code TSC.at n=41A033616
- Number of partitions of n into parts not of the form 17k, 17k+6 or 17k-6. Also number of partitions with at most 5 parts of size 1 and differences between parts at distance 7 are greater than 1.at n=27A035967
- Numbers having four 1's in base 6.at n=20A043376
- Numbers k such that the string 7,7 occurs in the base 9 representation of k but not of k-1.at n=29A044321
- Numbers k such that string 1,9 occurs in the base 10 representation of k but not of k-1.at n=27A044351
- Numbers n such that string 7,7 occurs in the base 9 representation of n but not of n+1.at n=29A044702
- Numbers n such that string 1,9 occurs in the base 10 representation of n but not of n+1.at n=27A044732
- Numbers n such that string 4,1 occurs in the base 10 representation of n but not of n+1.at n=26A044754
- Numbers whose base-5 representation contains exactly two 3's and two 4's.at n=38A045302
- T(n,n+1), array T as in A047140.at n=7A047146
- Numbers k such that k^6 == 1 (mod 7^3).at n=43A056083
- a(n) = least value such that sequence increases and pairwise differences are unique.at n=37A058335