2353
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2548
- Proper Divisor Sum (Aliquot Sum)
- 195
- 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
- 2160
- Möbius Function
- 1
- Radical
- 2353
- Omega Function (Ω)
- 2
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 32
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- Central polygonal numbers: a(n) = n^2 - n + 1.at n=49A002061
- a(n) = Sum_{d|n, d == 1 mod 4} d^2 - Sum_{d|n, d == 3 mod 4} d^2.at n=48A002173
- Pseudoprimes to base 7.at n=9A005938
- Number of distributive lattices; also number of paths with n turns when light is reflected from 5 glass plates.at n=6A006358
- Coordination sequence T2 for Zeolite Code ATS.at n=35A008039
- Coordination sequence T1 for Zeolite Code BIK.at n=30A008047
- Coordination sequence T1 for Zeolite Code MFS.at n=30A008173
- Coordination sequence T6 for Zeolite Code NES.at n=31A008210
- Expansion of Jacobi theta constant theta_2^6 /(64q^(3/2)).at n=36A008440
- Coordination sequence T2 for Zeolite Code iRON.at n=34A009882
- Quadruples of different integers from [ 1,n ] with no common factors between pairs.at n=26A015623
- Powers of fifth root of 4 rounded to nearest integer.at n=28A018124
- Powers of fifth root of 4 rounded up.at n=28A018125
- Powers of fifth root of 16 rounded to nearest integer.at n=14A018160
- Powers of fifth root of 16 rounded up.at n=14A018161
- Cyclotomic polynomials at x=7.at n=12A019325
- Pseudoprimes to base 19.at n=20A020147
- Pseudoprimes to base 48.at n=21A020176
- Pseudoprimes to base 49.at n=39A020177
- Strong pseudoprimes to base 7.at n=4A020233