Properties of the Number 30997

Thirty Thousand Nine Hundred Ninety-Seven

Basics

Value: 30996 → 30997 → 30998

Parity: odd

Prime: No

Previous Prime: 30983

Next Prime: 31013

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 139 × 223

Divisors: 1, 139, 223, 30997

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100100010101

Octal: 74425

Duodecimal: 15B31

Hexadecimal: 7915

Square: 960814009

Square Root: 176.05964898295122

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of sets of nonempty subsets of {1..n} contradicting a strict version of the axiom of choice. A367903

Number of subsets of {1..n} such that it is not possible to choose a different binary index of each element. A370637

T(n,k)=Number of (n+5)X(k+5) binary arrays with every 6X6 subblock commuting with each horizontal and vertical neighbor 6X6 subblock. A186619

Number of subsets of {1..n} containing n such that it is not possible to choose a different binary index of each element. A370589

Centered 36-gonal numbers. A195316

Regular triangle read by rows where T(n,k) is the number of labeled simple graphs on n vertices where all non-isolated vertices have degree k. A319729

a(n) is the smallest number which can be represented as the sum of n distinct positive cubes in exactly 2 ways, or -1 if no such number exists. A374417

a(n) = 3n³ - 2n² + n - 1. A130885

Number of (n+5) X 8 binary arrays with every 6 X 6 subblock commuting with each horizontal and vertical neighbor 6 X 6 subblock. A186613

Number of (n+5)X9 binary arrays with every 6X6 subblock commuting with each horizontal and vertical neighbor 6X6 subblock. A186614