16263
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 25480
- Proper Divisor Sum (Aliquot Sum)
- 9217
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9936
- Möbius Function
- 0
- Radical
- 5421
- Omega Function (Ω)
- 4
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 40
- 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
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Gaps of 9 in sequence A038593 (upper terms).at n=12A038658
- Numbers ending with '3' that are the difference of two positive cubes.at n=33A038858
- a(n) = (n+3)^3 - n^3.at n=40A038865
- Numbers whose 4th power can be expressed as the sum of two positive cubes in more than one way.at n=10A051388
- Triangle of Stirling numbers of order 3.at n=31A059022
- Numbers k such that sigma(k) = phi(k+1) + phi(k) + phi(k-1).at n=14A065986
- Sum of the first n Sophie Germain primes.at n=39A066819
- Fibonacci(p-J(p,5)) mod p^2, where p is the n-th prime and J is the Jacobi symbol.at n=33A113650
- Triangle T(n,k) = Sum_{i=1..n} 2^(i-1)*C(n+2*k-i-1, k-1), 1 <= k <= n.at n=47A185139
- Numbers that are both a sum and a difference of two positive cubes.at n=35A225908
- Numbers n such that 3*n and n^3 have the same digit sum.at n=32A260906
- Values of a^3 + b^3 such that the equation a^3 + b^3 = x^2 + y^2 + z^2 is not soluble where a, b > 0 and x, y, z >= 0.at n=38A272174
- a(n) is the number of ways of putting n labeled balls into 2 indistinguishable boxes such that each box contains at least 3 balls.at n=9A272352
- Numbers in A003325 whose 4th power is the sum of two positive cubes in a nontrivial way.at n=7A282872
- Positive numbers that are the sum of two (possibly negative) cubes in at least 2 ways (primitive solutions).at n=32A293647
- Sum of two (possibly negative) coprime cubes in at least 2 ways, but not the sum of 2 noncoprime cubes.at n=16A293648
- Unique terms in sequence A294640, in order by size.at n=67A294641
- Starts of runs of 4 consecutive Gray-code Niven numbers (A344341).at n=25A344344