634
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 954
- Proper Divisor Sum (Aliquot Sum)
- 320
- 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
- 316
- Möbius Function
- 1
- Radical
- 634
- 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
- 38
- Smith Number
- yes
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
- yes
- Odd
- no
Names
- German
- sechshundertvierunddreißig· ordinal: sechshundertvierunddreißigste
- English
- six hundred thirty-four· ordinal: six hundred thirty-fourth
- Spanish
- seiscientos treinta y cuatro· ordinal: 634º
- French
- six cent trente-quatre· ordinal: six cent trente-quatrième
- Italian
- seicentotrentaquattro· ordinal: 634º
- Latin
- sescenti triginta quattuor· ordinal: 634.
- Portuguese
- seiscentos e trinta e quatro· ordinal: 634º
Appears in sequences
- Smith (or joke) numbers: composite numbers k such that sum of digits of k = sum of digits of prime factors of k (counted with multiplicity).at n=27A006753
- Inverse Moebius transform of triangular numbers.at n=32A007437
- Coordination sequence T3 for Zeolite Code AEI.at n=19A008003
- Coordination sequence T1 for Zeolite Code EPI.at n=16A008090
- Coordination sequence T3 for Zeolite Code MEI.at n=18A008148
- Expansion of 1/( Product_{j=0..5} (1-x^(2*j+1)) ).at n=43A008675
- Coordination sequence T2 for Zeolite Code -PAR.at n=18A009856
- Coordination sequence T3 for Zeolite Code -ROG.at n=19A009861
- Coordination sequence T1 for Zeolite Code AHT.at n=17A009866
- a(n) = floor(n*(n - 1)*(n - 2)/31).at n=28A011913
- Antidiagonals of the prime-composite array B(m,n) (see A067681) that are zeros from the first Borve conjecture.at n=50A014617
- Numbers n such that phi(n) + 8 | sigma(n + 8), where phi = A000010 and sigma = A000203.at n=28A015787
- a(n) = 12*n + 10.at n=52A017641
- Expansion of 1/(1-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17).at n=45A017875
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFI = ZSM-5 Nan[AlnSi96-nO192] starting with a T2 atom.at n=9A019159
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTT = ZSM-23 Nan[AlnSi24-nO48] starting with a T4 atom.at n=9A019189
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite TON = Theta-1 Nan[AlnSi24-nO48] starting with a T2 atom.at n=9A019244
- Hoax numbers: composite numbers whose digit-sum equals the sum of the digit-sums of its distinct prime factors.at n=34A019506
- Numbers k such that the continued fraction for sqrt(k) has period 23.at n=1A020362
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly ten 1's.at n=25A020446