1835
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2208
- Proper Divisor Sum (Aliquot Sum)
- 373
- 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
- 1464
- Möbius Function
- 1
- Radical
- 1835
- 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
- 130
- Smith Number
- no
- Vampire 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
Appears in sequences
- Number of partitions of n, with three kinds of 1 and 2 and two kinds of 3,4,5,....at n=10A000714
- From higher-order Bernoulli numbers: absolute value of numerator of D-number D2n(2n-1).at n=2A001905
- Numbers k such that (k^2 + k + 1)/19 is prime.at n=40A002643
- Coordination sequence T2 for Zeolite Code EPI.at n=27A008091
- Coordination sequence T4 for Zeolite Code ZON.at n=30A009922
- Powers of fifth root of 18 rounded down.at n=13A018165
- Powers of fifth root of 18 rounded to nearest integer.at n=13A018166
- Numbers k such that the continued fraction for sqrt(k) has period 22.at n=39A020361
- Fibonacci sequence beginning 1, 20.at n=11A022110
- Place where n-th 1 occurs in A023127.at n=38A022789
- Numbers k such that Fibonacci(k) == -5 (mod k).at n=49A023165
- [ 4th elementary symmetric function of sqrt(k+1) ], k = 1,2,...,n.at n=4A025221
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 16 (most significant digit on right).at n=19A029509
- Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 7.at n=28A031410
- Number of partitions satisfying cn(2,5) <= cn(0,5) and cn(3,5) <= cn(0,5).at n=31A039863
- Numerators of continued fraction convergents to sqrt(773).at n=3A042490
- Numbers k such that 3 and 5 occur juxtaposed in the base-10 representation of k but not of k-1.at n=36A043241
- Numbers k such that 3 and 5 occur juxtaposed in the base-10 representation of k but not of k+1.at n=36A044021
- Numbers k such that string 5,5 occurs in the base 6 representation of k but not of k-1.at n=49A044137
- Numbers n such that string 5,3 occurs in the base 8 representation of n but not of n-1.at n=31A044230