995
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
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1200
- Proper Divisor Sum (Aliquot Sum)
- 205
- 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
- 792
- Möbius Function
- 1
- Radical
- 995
- 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
- 23
- 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
- neunhundertfünfundneunzig· ordinal: neunhundertfünfundneunzigste
- English
- nine hundred ninety-five· ordinal: nine hundred ninety-fifth
- Spanish
- novecientos noventa y cinco· ordinal: 995º
- French
- neuf cent quatre-vingt-quinze· ordinal: neuf cent quatre-vingt-quinzième
- Italian
- novecentonovantacinque· ordinal: 995º
- Latin
- nongenti nonaginta quinque· ordinal: 995.
- Portuguese
- novecentos e noventa e cinco· ordinal: 995º
Appears in sequences
- Number of series-reduced rooted trees with n nodes.at n=15A001679
- Primes multiplied by 5.at n=45A001750
- a(n) = floor(n*phi^11), where phi is the golden ratio, A001622.at n=5A004926
- a(n) = round(n*phi^11), where phi is the golden ratio, A001622.at n=5A004946
- a(n) = smallest number k such that Product_{i=2..k+1} prime(i)/(prime(i)-1) > n.at n=8A005580
- Coordination sequence T2 for Zeolite Code LOV.at n=21A008135
- Coordination sequence T3 for Zeolite Code PAU.at n=23A008221
- Coordination sequence T1 for Scapolite.at n=20A008262
- Crystal ball sequence for lattice {E_7}*.at n=2A008922
- Expansion of e.g.f.: sech(arctan(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-11/4!*x^4+100/5!*x^5...at n=6A012419
- Numbers k such that phi(k + 5) | sigma(k).at n=42A015821
- Numbers k such that the continued fraction for sqrt(k) has period 12.at n=47A020351
- Ordered sequence of distinct terms of the form floor(x^i * floor(x^j)), where x = sqrt(2).at n=53A022768
- a(n) = a(n-1) + c(n-1) for n >= 2, a( ) increasing, given a(1)=6; where c( ) is complement of a( ).at n=39A022938
- Numbers k such that Fibonacci(k) == 5 (mod k).at n=37A023176
- [ (3rd elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+2 odd positive integers}.at n=53A024204
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = A000201 (lower Wythoff sequence).at n=45A024373
- a(n) = position of 2*n^3 in A003325.at n=37A024667
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A001950 (upper Wythoff sequence), t = A014306.at n=54A024691
- Sum of remainders of n mod prime(k), for k = 1,2,3,...,n.at n=36A024925