Properties of the Number 30889

Thirty Thousand Eight Hundred Eighty-Nine

Basics

Value: 30888 → 30889 → 30890

Parity: odd

Prime: No

Previous Prime: 30881

Next Prime: 30893

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 17 × 23 × 79

Divisors: 1, 17, 23, 79, 391, 1343, 1817, 30889

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100010101001

Octal: 74251

Duodecimal: 15A61

Hexadecimal: 78a9

Square: 954130321

Square Root: 175.7526671205874

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

Odd Fibonacci pseudoprimes: odd composite numbers k such that either (1) k divides Fibonacci(k-1) if k == +-1 (mod 5) or (2) k divides Fibonacci(k+1) if k == +-2 (mod 5). A81264

Composite numbers k coprime to 13 such that k divides A006190(k-Kronecker(13,k)). A327653

Records for minima of the positive distance d between the ninth power of a positive integer·and the square of an integer y such that d = x⁹ - y² (x <> k² and y <> k⁹). A179790

Composite numbers k such that k divides F(k-1) where F(j) are the Fibonacci numbers. A69106

Odd composite integers m such that F(m)² == 1 (mod m), where F(m) is the m-th Fibonacci number. A337231

Sarrus numbers A001567 that are not Carmichael numbers A002997. A153508

Composite numbers n with the property that φ(n) divides (n-1)². A173703

Composite numbers k of the form 4u+1 for which the odd part of φ(k) divides k-1. A339870

Composite numbers n such that λ(n) divides 2n-2, where λ is the Carmichael λ function (A002322). A231569

Fermat pseudoprimes to base 2 with three prime factors. A215672