1369
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
- 3
Divisibility
- Divisor Count
- 3
- Divisor Sum
- 1407
- Proper Divisor Sum (Aliquot Sum)
- 38
- 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
- 1332
- Möbius Function
- 0
- Radical
- 37
- Omega Function (Ω)
- 2
- 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
- yes
- 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
- 39
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- no
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- yes
- Achilles Number
- no
- Perfect Power
- yes
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- a(n) = a(n-1) + a(n-2)^3.at n=7A000280
- Boustrophedon transform of powers of 2.at n=6A000752
- Squares of primes.at n=11A001248
- Perfect powers: m^k where m > 0 and k >= 2.at n=47A001597
- Squares and cubes.at n=45A002760
- Numbers that are the sum of 11 positive 6th powers.at n=22A003367
- a(n) = ceiling(n*phi^9), where phi is the golden ratio, A001622.at n=18A004964
- Sum of squares of primes dividing n.at n=36A005063
- Sum of squares of odd primes dividing n.at n=73A005066
- Sum of squares of odd primes dividing n.at n=36A005066
- Sum of squares of primes = 1 mod 3 dividing n.at n=36A005071
- Sum of squares of primes = 1 mod 3 dividing n.at n=73A005071
- Sum of squares of primes = 1 mod 4 dividing n.at n=73A005079
- Sum of squares of primes = 1 mod 4 dividing n.at n=36A005079
- Number of self-avoiding walks of any length from NW to SW corners of a grid or lattice with n rows and 3 columns.at n=7A006189
- Number of nonintersecting (or self-avoiding) rook paths joining opposite corners of 3 X n board.at n=6A006192
- Discriminants of totally real cubic fields.at n=36A006832
- Erroneous version of A048798.at n=35A007914
- Coordination sequence T1 for Zeolite Code AFR.at n=28A008019
- Coordination sequence T1 for Zeolite Code MFS.at n=23A008173