8019
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 14
- Divisor Sum
- 13116
- Proper Divisor Sum (Aliquot Sum)
- 5097
- 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
- 4860
- Möbius Function
- 0
- Radical
- 33
- Omega Function (Ω)
- 7
- 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
- 158
- 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
- Numbers that are the sum of 2 positive 5th powers.at n=17A003347
- Numbers of the form 3^i*11^j.at n=21A003597
- Degrees of irreducible representations of McLaughlin group McL.at n=15A003909
- Degrees of irreducible representations of McLaughlin group McL.at n=16A003909
- Numbers that are the sum of at most 2 positive 5th powers.at n=24A004842
- Positive numbers k such that k = x^5 + y^5 has a solution in nonzero integers x, y.at n=32A020896
- Numbers with 14 divisors.at n=32A030632
- a(n) = 11*n^2.at n=27A033584
- Numbers having three 0's in base 9.at n=33A043455
- Numbers whose base-6 representation has exactly 6 runs.at n=18A043614
- Odd numbers divisible by exactly 7 primes (counted with multiplicity).at n=4A046320
- Sum of 5th powers of digits of n.at n=36A055014
- Numbers n such that n | 3^n + 2^n + 1^n.at n=20A056645
- Numbers k such that k | 10^k + 9^k + 8^k.at n=12A057232
- Numbers n such that n | 9^n + 8^n + 7^n + 6^n.at n=43A057242
- Numbers k such that k | 8^k + 7^k + 6^k + 5^k + 4^k + 3^k.at n=42A057261
- Numbers n such that n | 12^n + 11^n + 10^n + 9^n + 8^n + 7^n + 6^n.at n=37A057263
- Numbers k such that 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=31A057292
- Ninth column of triangle A067417.at n=3A067424
- Numbers k such that the sum over the prime divisors of k equals the number of divisors of k.at n=30A069234