3731
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4704
- Proper Divisor Sum (Aliquot Sum)
- 973
- 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
- 2880
- Möbius Function
- -1
- Radical
- 3731
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 69
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Stirling numbers of the first kind: s(n+2, n).at n=12A000914
- 12-gonal (or dodecagonal) pyramidal numbers: a(n) = n*(n+1)*(10*n-7)/6.at n=13A007587
- List of pairs of primes in reverse order.at n=5A007797
- Coordination sequence T1 for Zeolite Code NES.at n=39A008205
- Stirling numbers of first kind S1(14,n).at n=11A011524
- Positive integers n such that 2^n == 2^11 (mod n).at n=49A015935
- Numerator of sum of -4th powers of divisors of n.at n=11A017671
- Pseudoprimes to base 92.at n=33A020220
- Strong pseudoprimes to base 92.at n=10A020318
- a(n) = n*(11*n+1)/2.at n=26A022269
- a(1) = 3; a(n+1) = a(n)-th composite.at n=25A022451
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = (odd natural numbers).at n=19A025083
- Duplicate of A022269.at n=25A026817
- Odd numbers in the (2,3)-Pascal triangle A029600 that are different from 3.at n=49A029606
- Distinct odd numbers in (2,3)-Pascal triangle A029600.at n=44A029608
- Numbers to the right of the central elements of the (2,3)-Pascal triangle A029600 that are different from 3.at n=45A029615
- Odd numbers to the right of the central elements of the (2,3)-Pascal triangle A029600.at n=30A029616
- Odd numbers in (3,2)-Pascal triangle A029618.at n=60A029622
- Odd numbers in (3,2)-Pascal triangle A029618 that are different from 3.at n=45A029624
- Distinct odd numbers in (3,2)-Pascal triangle A029618.at n=40A029626