16423
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 17928
- Proper Divisor Sum (Aliquot Sum)
- 1505
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 14920
- Möbius Function
- 1
- Radical
- 16423
- 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
- 159
- 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
- Expansion of (1-x)/( (1+x)*(1-2*x)*(1-3*x)*(1-4*x)).at n=6A004057
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite VNI = VPI-9 Rb44K4[Zn24Si96O240].48H2O starting with a T2 atom.at n=13A019253
- Number of partitions of n with nonnegative rank.at n=38A064174
- Number of connected circulant graphs on n nodes.at n=33A075545
- Number of partitions of n into >= 2 parts and with minimum part >= 2.at n=45A083751
- Number of partitions of n in which both smallest and largest part occur only once.at n=45A117995
- Number of conjugacy classes of subgroups of the symmetric group which are not subgroups of the alternating group.at n=13A218965
- Number of c-squarefree numbers (A233564) less than 2^n.at n=23A229898
- Number of partitions p of n such that 2*min(p) + (number of parts of p) is not a part of p.at n=35A238542
- Number of n X 2 nonnegative integer arrays with upper left 0 and lower right n+2-4 and value increasing by 0 or 1 with every step right or down.at n=22A252870
- Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=7A302410
- T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=52A302415
- Except a(0)=1 and a(4)=0, number of integer partitions of n with no 1's and at least two parts.at n=46A379720
- Centered heptagonal numbers which are semiprime.at n=25A381960