965
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1164
- Proper Divisor Sum (Aliquot Sum)
- 199
- 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
- 768
- Möbius Function
- 1
- Radical
- 965
- 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
- neunhundertfünfundsechzig· ordinal: neunhundertfünfundsechzigste
- English
- nine hundred sixty-five· ordinal: nine hundred sixty-fifth
- Spanish
- novecientos sesenta y cinco· ordinal: 965º
- French
- neuf cent soixante-cinq· ordinal: neuf cent soixante-cinqième
- Italian
- novecentosessantacinque· ordinal: 965º
- Latin
- nongenti sexaginta quinque· ordinal: 965.
- Portuguese
- novecentos e sessenta e cinco· ordinal: 965º
Appears in sequences
- Numbers m such that Fibonacci(m) ends with m.at n=31A000350
- Primes multiplied by 5.at n=43A001750
- Numbers k such that (k^2 + k + 1)/13 is prime.at n=46A002642
- a(n) = floor(n*phi^12), where phi is the golden ratio, A001622.at n=3A004927
- Number of fractions in Farey series of order n.at n=56A005728
- Expansion of (x^6-x^5-x^4+2x^2)/((1-x^3)(1-x^2)^2(1-x)).at n=36A007988
- Coordination sequence T3 for Zeolite Code LAU.at n=22A008126
- Coordination sequence T4 for Zeolite Code MEL.at n=20A008153
- Coordination sequence T1 for Zeolite Code MON.at n=19A008181
- Numbers k such that the continued fraction for sqrt(k) has period 5.at n=26A010337
- A B_2 sequence: a(n) = least value such that sequence increases and pairwise sums of distinct elements are all distinct.at n=27A011185
- Least d for which the number with continued fraction [n,n,n,n...] is in Q(sqrt(d)).at n=30A013946
- a(n) = ((n+1)-st Fibonacci number) - (n-th non-Fibonacci number).at n=14A014241
- Quadruples of different integers from [ 1,n ] with no global factor.at n=13A015622
- Number of 5-tuples of different integers from [ 2,n ] with no common factors among triples.at n=14A015649
- Positive integers n such that 2^n == 2^5 (mod n).at n=35A015925
- Pseudoprimes to base 81.at n=39A020209
- Index of 2^n within sequence of numbers of form 2^i*3^j (A003586).at n=54A022331
- Number of 1's in n-th term of A006711.at n=26A022477
- Numbers k such that Fibonacci(k) == -5 (mod k).at n=33A023165