1069
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 1070
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 1068
- Möbius Function
- -1
- Radical
- 1069
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 180
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of nonnegative solutions to x^2 + y^2 + z^2 <= n^2.at n=12A000604
- Primes p of the form 3k+1 such that Sum_{x=1..p} cos(2*Pi*x^3/p) > sqrt(p).at n=44A000921
- Primes with 6 as smallest primitive root.at n=11A001125
- Primes p such that the multiplicative order of 2 modulo p is (p-1)/3.at n=16A001133
- Number of rooted trees with n vertices in which vertices at the same level have the same degree.at n=40A003238
- Numbers that are the sum of 8 positive 5th powers.at n=35A003353
- From a nim-like game.at n=24A003412
- Class 4- primes (for definition see A005109).at n=26A005112
- Primes p such that 2p-1 is also prime.at n=36A005382
- Emirps (primes whose reversal is a different prime).at n=41A006567
- Primes with both 10 and -10 as primitive root.at n=32A007349
- Primes of the form 8k + 5.at n=46A007521
- Smallest odd number expressible in at least n ways as p+2*m^2 where p is 1 or a prime and m >= 0.at n=17A007697
- Coordination sequence T5 for Zeolite Code -CLO.at n=29A009854
- Coordination sequence T4 for Zeolite Code CON.at n=23A009871
- Least m such that the continued fraction for sqrt(m) has period n.at n=47A013646
- Primes of the form x^2 + 27y^2.at n=26A014752
- Six iterations of Reverse and Add are needed to reach a palindrome.at n=15A015984
- Numbers k=3*m+1 such that 2^m == 1 (mod k).at n=27A016108
- Powers of cube root of 5 rounded to nearest integer.at n=13A017989