1598
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2592
- Proper Divisor Sum (Aliquot Sum)
- 994
- 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
- 736
- Möbius Function
- -1
- Radical
- 1598
- 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
- 73
- 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
- Essentially the same as A001611.at n=15A000381
- a(n) = Fibonacci(n) + 1.at n=17A001611
- Inverse Möbius transform of A003965.at n=46A003981
- a(n) = floor(n*phi^10), where phi is the golden ratio, A001622.at n=13A004925
- a(n) = ceiling(n*phi^8), where phi is the golden ratio, A001622.at n=34A004963
- Numbers not of form p + 2^x + 2^y.at n=33A006286
- Inverse Moebius transform of Fibonacci numbers 1,1,2,3,5,8,...at n=16A007435
- Fibonacci(n) - (-1)^n.at n=16A007492
- Coordination sequence T4 for Zeolite Code DDR.at n=25A008074
- Coordination sequence T4 for Zeolite Code MTW.at n=26A008199
- a(n) = n^2 - 2.at n=39A008865
- If a, b in sequence, so is ab+5.at n=24A009304
- Coordination sequence T1 for Zeolite Code ZON.at n=28A009919
- a(n+1) = a(n) - F(n) if > 0, otherwise a(n) + F(n), where F() are Fibonacci numbers; a(0) = 0.at n=18A011369
- Numbers k such that sigma(k) = sigma(k+7).at n=9A015867
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17-x^18-x^19-x^20).at n=59A017896
- Pisot sequences L(4,6), E(4,6).at n=13A020706
- Pisot sequences L(6,9), E(6,9).at n=12A020717
- a(n) = n*(11*n+1)/2.at n=17A022269
- Expansion of Product_{m>=1} (1+x^m)^2.at n=20A022567