16900
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 27
- Divisor Sum
- 39711
- Proper Divisor Sum (Aliquot Sum)
- 22811
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6240
- Möbius Function
- 0
- Radical
- 130
- Omega Function (Ω)
- 6
- 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
- yes
- 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
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- yes
- Achilles Number
- no
- Perfect Power
- yes
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- a(n) = (prime(n) - 1)^2.at n=31A005722
- a(n) = (3*n+1)^2.at n=43A016778
- a(n) = (4n + 2)^2.at n=32A016826
- a(n) = (5*n)^2.at n=26A016850
- a(n) = (6*n + 4)^2.at n=21A016958
- a(n) = (7*n + 4)^2.at n=18A017030
- a(n) = (8*n + 2)^2.at n=16A017090
- a(n) = (9*n + 4)^2.at n=14A017210
- a(n) = (10*n)^2.at n=13A017270
- a(n) = (11*n + 9)^2.at n=11A017498
- a(n) = (12*n+10)^2.at n=10A017642
- a(n) is the smallest square that is the sum of n distinct positive squares.at n=35A018936
- Squares which are a decimal concatenation of two or more squares.at n=35A019547
- Least square base n doublet (written in base 10).at n=16A020340
- Expansion of Product_{m>=1} (1-m*q^m)^26.at n=5A022686
- a(n) = (d(n)-r(n))/2, where d = A026043 and r is the periodic sequence with fundamental period (1,1,0,0).at n=43A026044
- Smallest nontrivial extension of n^2 which is a square.at n=12A030686
- Squares which can be rearranged into squares with the same number of digits.at n=32A034289
- Squares that remain a square if a suitably chosen digit is dropped.at n=44A034377
- Squares and omitting some digit gives another number in this list.at n=24A034378