986
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
- 8
- Divisor Sum
- 1620
- Proper Divisor Sum (Aliquot Sum)
- 634
- 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
- 448
- Möbius Function
- -1
- Radical
- 986
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- no
- 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
- neunhundertsechsundachtzig· ordinal: neunhundertsechsundachtzigste
- English
- nine hundred eighty-six· ordinal: nine hundred eighty-sixth
- Spanish
- novecientos ochenta y seis· ordinal: 986º
- French
- neuf cent quatre-vingt-six· ordinal: neuf cent quatre-vingt-sixième
- Italian
- novecentoottantasei· ordinal: 986º
- Latin
- nongenti octoginta sex· ordinal: 986.
- Portuguese
- novecentos e oitenta e seis· ordinal: 986º
Appears in sequences
- a(n) = Fibonacci(n) - 1.at n=15A000071
- Let A(n) = #{(i,j): i^2 + j^2 <= n}, V(n) = Pi*n, P(n) = A(n) - V(n); sequence gives values of n where |P(n)| sets a new record.at n=21A000099
- Strobogrammatic numbers: the same upside down.at n=18A000787
- a(n) = (7*n+1)*(7*n+6).at n=4A001526
- Numbers that are the sum of 12 positive 5th powers.at n=45A003357
- Numbers that are the sum of 6 positive 6th powers.at n=11A003362
- a(n) = 7*a(n-1) - a(n-2) + 5.at n=3A003481
- Maximal number of pieces obtained by slicing a torus (or a bagel) with n cuts: (n^3 + 3*n^2 + 8*n)/6 (n > 0).at n=17A003600
- Möbius transform of A003965.at n=42A003980
- a(n) = floor(n*phi^8), where phi is the golden ratio, A001622.at n=21A004923
- Number of corners, or planar partitions of n with only one row and one column.at n=13A006330
- Add 5, then reverse digits!.at n=37A007397
- Fibonacci(n) - (-1)^n.at n=15A007492
- a(n) = (5*n + 1)^2 + 4*n + 1.at n=6A007533
- Coordination sequence T10 for Zeolite Code MFI.at n=20A008162
- Coordination sequence T9 for Zeolite Code MFI.at n=20A008172
- Coordination sequence T6 for Zeolite Code MTT.at n=19A008194
- Coordination sequence T5 for Zeolite Code NON.at n=19A008216
- Number of distinct orders of permutations of n objects; number of nonisomorphic cyclic subgroups of symmetric group S_n.at n=49A009490
- Coordination sequence T1 for Zeolite Code ZON.at n=22A009919