8069
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
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 8070
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 8068
- Möbius Function
- -1
- Radical
- 8069
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 70
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- yes
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1014
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Smallest nonnegative number that is the sum of 3 squares in exactly n ways.at n=38A000437
- Smallest number that is the sum of 3 squares in at least n ways.at n=38A000451
- Smallest number that is the sum of 3 squares in at least n ways.at n=37A000451
- Number of unlabeled connected interval graphs with n nodes.at n=8A005976
- Discriminants of totally real quartic fields.at n=37A023680
- a(n) is the smallest number that is the sum of 3 nonzero squares in exactly n ways.at n=37A025414
- Least sum of 3 distinct nonzero squares in exactly n ways.at n=37A025415
- Primes that do not contain any other prime as a proper substring.at n=44A033274
- Positive numbers having the same set of digits in base 6 and base 9.at n=40A037436
- Numbers whose base-6 representation has exactly 6 runs.at n=29A043614
- Primes with first digit 8.at n=23A045714
- Primes having only {0, 6, 8, 9} as digits.at n=7A053580
- Primes having only 0,4,6,8,9 as digits.at n=21A061372
- a(n) = floor(Pi^n mod n^Pi).at n=22A066434
- Squared radii of the spheres around (0,0,0) that contain record numbers of lattice points.at n=45A071609
- Prime sum of n-th group of successive primes in A073684.at n=29A073682
- Primes of the form x^2 + (x+3)^2.at n=17A076727
- Prime numbers using only the curved digits 0, 3, 6, 8 and 9.at n=31A079652
- Numbers k such that 4^k + 9i is a Gaussian prime.at n=23A084541
- Irregular primes whose indices are irregular primes of order one.at n=20A090869