1493
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
- 2
- Divisor Sum
- 1494
- 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
- 1492
- Möbius Function
- -1
- Radical
- 1493
- 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
- 21
- 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
- 238
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Class 4- primes (for definition see A005109).at n=36A005112
- Primes p such that the NSW number A002315((p-1)/2) is prime.at n=12A005850
- Numbers k such that k-6, k, and k+6 are primes.at n=39A006489
- Coordination sequence T2 for Zeolite Code MFS.at n=24A008174
- Coordination sequence T6 for Zeolite Code MTW.at n=25A008201
- Simplexity of the n-cube: minimal cardinality of triangulation of n-cube using n-simplices whose vertices are vertices of the n-cube.at n=6A019503
- Numbers k such that the continued fraction for sqrt(k) has period 19.at n=10A020358
- n-th prime p(k) such that p(k) + p(k+6) = p(k+2) + p(k+4).at n=28A022891
- Primes p such that 7*p + 8 is also prime.at n=43A023226
- Primes that remain prime through 2 iterations of function f(x) = 6x + 5.at n=50A023257
- Primes that remain prime through 2 iterations of function f(x) = 8x + 9.at n=15A023264
- Primes that remain prime through 2 iterations of function f(x) = 10x + 9.at n=28A023270
- Least k such that first k terms of A022303 contain n more 1's than 2's.at n=8A025517
- Palindromic primes in base 16 (or hexadecimal), but written here in base 10.at n=19A029732
- Smallest prime formed by appending a number to the n-th prime.at n=34A030670
- a(n) = prime(7*n).at n=33A031340
- a(n) = prime(6*n - 2).at n=39A031380
- a(n) = prime(8*n - 2).at n=29A031382
- a(n) = prime(10*n - 2).at n=23A031384
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 10.at n=2A031423