13388
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 23436
- Proper Divisor Sum (Aliquot Sum)
- 10048
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6692
- Möbius Function
- 0
- Radical
- 6694
- Omega Function (Ω)
- 3
- 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
- 94
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers k such that 91*2^k+1 is prime.at n=7A032395
- McKay-Thompson series of class 18a for Monster.at n=57A058536
- McKay-Thompson series of class 18d for the Monster group.at n=19A058539
- Numbers n whose sum of divisors and number of divisors are both triangular numbers.at n=36A070996
- Round(1000*x), where x is the solution to x = 5^(n-x).at n=15A104744
- Numbers n such that 15*prime(n)+{-4,-2,2,4} are all primes.at n=33A176002
- Number of partitions p of n such that the number of distinct parts is not a part and max(p) - min(p) is a part.at n=48A241388
- Numbers k such that A248891(k) = 3.at n=46A248903
- Number of compositions of n such that the maximal distance between two identical parts equals four.at n=15A262197
- Number of induced paths in the n-ladder graph P_2 X P_n.at n=13A360201