2930
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
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5292
- Proper Divisor Sum (Aliquot Sum)
- 2362
- 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
- 1168
- Möbius Function
- -1
- Radical
- 2930
- 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
- 35
- 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
- yes
- Odd
- no
Appears in sequences
- a(n) = n concatenated with n + 1.at n=28A001704
- Dodecahedral surface numbers: a(0)=0, a(1)=1, a(2)=20, thereafter 2*((3*n-7)^2 + 21).at n=15A007589
- Coordination sequence T1 for Zeolite Code MOR.at n=35A008182
- Coordination sequence T1 for Zeolite Code -PAR.at n=38A009855
- Numbers k such that the continued fraction for sqrt(k) has period 13.at n=17A020352
- Numbers k such that Fibonacci(k) == -55 (mod k).at n=47A023170
- Katadromes: digits in base 5 are in strict descending order.at n=30A023787
- Duplicate of A062813.at n=4A023812
- Pair up the numbers.at n=14A030655
- Concatenation of two or more consecutive positive integers.at n=37A035333
- Differences of A038011.at n=22A038012
- Coordination sequence T4 for Zeolite Code ESV.at n=36A038411
- Numbers n such that string 3,0 occurs in the base 10 representation of n but not of n-1.at n=32A044362
- Numbers n such that string 9,3 occurs in the base 10 representation of n but not of n-1.at n=31A044425
- Numbers n such that string 3,0 occurs in the base 10 representation of n but not of n+1.at n=32A044743
- Numbers k such that 6*7^k - 1 is prime.at n=16A046866
- Concatenate prevprime(n) and n.at n=27A049851
- McKay-Thompson series of class 35A for Monster.at n=32A058640
- McKay-Thompson series of class 58a for the Monster group.at n=57A058723
- Even integers that are not partial sums of A062547.at n=33A062548