2929
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3060
- Proper Divisor Sum (Aliquot Sum)
- 131
- 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
- 2800
- Möbius Function
- 1
- Radical
- 2929
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 97
- 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
- a(n) = a(n-1) + 4*a(n-2), a(0) = a(1) = 1.at n=9A006131
- Coordination sequence T2 for Zeolite Code MOR.at n=35A008183
- Coordination sequence T1 for Zeolite Code CZP.at n=35A019456
- Doublets: base-10 representation is the juxtaposition of two identical strings.at n=28A020338
- Numbers k such that the continued fraction for sqrt(k) has period 31.at n=9A020370
- a(n) = n*(7*n - 1)/2.at n=29A022264
- Index of 7^n within the sequence of the numbers of the form 2^i*7^j.at n=45A025720
- Coordination sequence T1 for Zeolite Code ITE.at n=37A027369
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 4.at n=22A031417
- Numbers whose set of base-11 digits is {2,3}.at n=15A032811
- Numbers whose set of base-13 digits is {1,4}.at n=21A032825
- Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,3.at n=4A037634
- Coordination sequence T2 for Zeolite Code ESV.at n=36A038410
- Sums of 5 distinct powers of 3.at n=36A038467
- Numbers k such that string 9,2 occurs in the base 10 representation of k but not of k+1.at n=31A044805
- Numbers whose consecutive digits differ by 7.at n=21A048409
- Starting index of a string of 3 or more consecutive equal digits in decimal expansion of Pi.at n=23A049515
- Starting index of a string of exactly 3 consecutive equal digits in decimal expansion of Pi.at n=17A049519
- Starting positions of strings of 2 4's in the decimal expansion of Pi.at n=27A050230
- Composite numbers k such that sigma(k + 6!) = sigma(k + 720) = sigma(k) + 720.at n=24A054984