4069
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4396
- Proper Divisor Sum (Aliquot Sum)
- 327
- 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
- 3744
- Möbius Function
- 1
- Radical
- 4069
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 157
- 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
- Number of paraffins.at n=24A005997
- Coordination sequence for Paracelsian.at n=43A008260
- Coordination sequence T4 for Zeolite Code RUT.at n=42A009900
- a(n) = floor(binomial(n,5)/5).at n=21A011851
- From George Gilbert's marks problem: jumping 3 marks at a time (initial positions).at n=17A019592
- Pseudoprimes to base 25.at n=40A020153
- Pseudoprimes to base 29.at n=28A020157
- Pseudoprimes to base 54.at n=20A020182
- Pseudoprimes to base 98.at n=35A020226
- Pseudoprimes to base 99.at n=36A020227
- Strong pseudoprimes to base 54.at n=8A020280
- Coordination sequence T4 for Zeolite Code CGS.at n=47A027368
- Schoenheim bound L_1(n,n-5,n-6).at n=14A036837
- Numbers ending with '9' that are the difference of two positive cubes.at n=18A038864
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 16.at n=38A051981
- Concatenation of n in base 10 down up to base 2 is prime, all numbers are interpreted as decimals.at n=35A054257
- Concatenation of n in base 2 up to base 10 and n in base 10 down to base 2 is prime, all numbers are interpreted as decimals.at n=2A054258
- Numbers k that divide 8^k + 7^k + 6^k + 5^k.at n=7A057243
- Numbers k such that k | 12^k + 11^k + 10^k + 9^k + 8^k + 7^k + 6^k + 5^k + 4^k + 3^k + 2^k + 1^k.at n=42A057291
- Coordination sequence T1 for Zeolite Code SFE.at n=42A057317