16977
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 30
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 22640
- Proper Divisor Sum (Aliquot Sum)
- 5663
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11316
- Möbius Function
- 1
- Radical
- 16977
- 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
- 66
- 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
- Difference between partial sums of partition numbers (A026905) and partial sums of numbers of partitions into distinct parts (A026906).at n=27A056870
- Number of connected simple graphs with n vertices, n+1 edges, and vertex degrees no more than 4.at n=11A112410
- Ascending sequence of numbers such that the sum of any two distinct elements (even + odd) is a prime number.at n=34A180743
- Number of nondecreasing arrangements of n+2 numbers in 0..3 with each number being the sum mod 4 of two others.at n=42A183906
- Number of 0..n arrays of length 3 with each element differing from at least one neighbor by something other than 1.at n=25A221574
- Number of arrangements of n pseudo-circles in the affine plane.at n=5A288559
- Numbers k such that the k-th composition in standard order is a permutation (of an initial interval).at n=42A333218
- Triangle read by rows: T(n,k) is the number of oriented series-parallel networks with n colored elements and without multiple unit elements in parallel using exactly k colors.at n=17A339297
- Numbers k such that the k-th composition in standard order is a non-alternating permutation of an initial interval of positive integers.at n=23A350250
- Indices of records in A361321.at n=43A361326