Properties of the Number 18407

Eighteen Thousand Four Hundred Seven

Basics

Value: 18406 → 18407 → 18408

Parity: odd

Prime: No

Previous Prime: 18401

Next Prime: 18413

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 79 × 233

Divisors: 1, 79, 233, 18407

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111100111

Octal: 43747

Duodecimal: A79B

Hexadecimal: 47e7

Square: 338817649

Square Root: 135.67239955127204

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 that divide Fibonacci(k+1). A69107

Number of nonagons that can be formed with perimeter n. A288255

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

Odd composites m that divide Fibonacci(m)-1. A94394

Numbers k which divide the sum of the Fibonacci numbers F(1) through F(k) and such that k is not a multiple of 24. A124456

Lucas pseudoprimes. A217120

MM-numbers of crossing set partitions. A324324

Odd integers m that divide the sum of the first m nonzero Fibonacci numbers. A331976

Odd composite integers m such that A001906(m-J(m,5)) == 0 (mod m) and gcd(m,5)=1, where J(m,5) is the Jacobi symbol. A340097