779
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 840
- Proper Divisor Sum (Aliquot Sum)
- 61
- 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
- 720
- Möbius Function
- 1
- Radical
- 779
- 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
- 59
- 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
- siebenhundertneunundsiebzig· ordinal: siebenhundertneunundsiebzigste
- English
- seven hundred seventy-nine· ordinal: seven hundred seventy-ninth
- Spanish
- setecientos setenta y nueve· ordinal: 779º
- French
- sept cent soixante-dix-neuf· ordinal: sept cent soixante-dix-neufième
- Italian
- settecentosettantanove· ordinal: 779º
- Latin
- septingenti septuaginta novem· ordinal: 779.
- Portuguese
- setecentos e setenta e nove· ordinal: 779º
Appears in sequences
- a(n) = n*(n+3)/2.at n=38A000096
- Number of partitions into non-integral powers.at n=7A000263
- Number of 2-factors in P_4 X P_n.at n=6A003693
- a(n) = ceiling(1000*log_10(n)).at n=5A004227
- Number of integer partitions of n whose smallest part is equal to the number of parts.at n=56A006141
- Number of strict 5th-order maximal independent sets in cycle graph.at n=37A007393
- A variation on Euclid: a(n)=g(n)-1, where g(0)=0, g(1)=1, g(n+1)=g(n)(g(n-1)+1).at n=6A007807
- Generated by a sieve: keep first number, drop every 2nd, keep first, drop every 3rd, keep first, drop every 4th, etc.at n=48A007952
- Coordination sequence T2 for Zeolite Code EMT.at n=23A008087
- Coordination sequence T3 for Zeolite Code GOO.at n=19A008113
- Coordination sequence T2 for Zeolite Code NON.at n=17A008213
- Composite but smallest prime factor >= 17.at n=16A008367
- Number of partitions of n into parts >= 3.at n=35A008483
- Multiples of 19.at n=41A008601
- If a, b in sequence, so is ab+5.at n=15A009304
- a(n) = n*(2*n + 3).at n=19A014106
- Sum of (Gaussian) q-binomial coefficients for q=-6.at n=4A015169
- Expansion of x/(1 - 5*x - 2*x^2).at n=5A015535
- Numbers k such that phi(k) | sigma(k + 11).at n=56A015858
- Six iterations of Reverse and Add are needed to reach a palindrome.at n=7A015984