979
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1080
- Proper Divisor Sum (Aliquot Sum)
- 101
- 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
- 880
- Möbius Function
- 1
- Radical
- 979
- 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
- 49
- Smith 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
Names
- German
- neunhundertneunundsiebzig· ordinal: neunhundertneunundsiebzigste
- English
- nine hundred seventy-nine· ordinal: nine hundred seventy-ninth
- Spanish
- novecientos setenta y nueve· ordinal: 979º
- French
- neuf cent soixante-dix-neuf· ordinal: neuf cent soixante-dix-neufième
- Italian
- novecentosettantanove· ordinal: 979º
- Latin
- nongenti septuaginta novem· ordinal: 979.
- Portuguese
- novecentos e setenta e nove· ordinal: 979º
Appears in sequences
- Dying rabbits: a(0) = 1; for 1 <= n <= 12, a(n) = Fibonacci(n); for n >= 13, a(n) = a(n-1) + a(n-2) - a(n-13).at n=16A000044
- Sum of fourth powers: 0^4 + 1^4 + ... + n^4.at n=5A000538
- Number of n-celled polyominoes with holes.at n=10A001419
- a(n) = 1^n + 2^n + ... + 5^n.at n=4A001552
- Numbers that are the sum of 11 positive 5th powers.at n=41A003356
- Sums of distinct nonzero 4th powers.at n=30A003999
- Occurrences of principal character.at n=9A005368
- Number of Twopins positions.at n=16A005690
- Number of modes of connections of 2n points.at n=6A006605
- Coordination sequence T12 for Zeolite Code MFI.at n=20A008164
- a(n+1) = a(n)-b(n+1) if a(n) >= b(n+1) else a(n)+b(n+1), where {b(n)} are the triangular numbers A000217.at n=53A008345
- Coordination sequence T2 for Zeolite Code DFO.at n=24A009876
- Coordination sequence for MgZn2, Mg position.at n=8A009939
- a(n) = floor( n*(n-1)*(n-2)/5 ).at n=18A011887
- a(n) = 2^n - n*(n-1)/2.at n=10A014844
- a(n) = lcm(n, Fibonacci(n)).at n=10A014965
- Coordination sequence T2 for Zeolite Code OSI.at n=20A016431
- Number of elements in the set {(x,y): 1 <= x,y <= n, gcd(x,y)=1}.at n=39A018805
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite APC = AlPO4-C [Al16P16O64](1,2) starting from a T2 atom.at n=4A018977
- "Pascal sweep" for k=4: draw a horizontal line through the 1 at binomial(k,0) in Pascal's triangle; rotate this line and record the sum of the numbers on it (excluding the initial 1).at n=71A019305