Properties of the Number 87643

Eighty-Seven Thousand Six Hundred Forty-Three

Basics

Value: 87642 → 87643 → 87644

Parity: odd

Prime: Yes

Previous Prime: 87641

Next Prime: 87649

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 87643

Divisors: 1, 87643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011001011011

Octal: 253133

Duodecimal: 42877

Hexadecimal: 1565b

Square: 7681295449

Square Root: 296.04560459496776

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

Primes that remain prime through 4 iterations of function f(x) = 2x + 5. A23304

Primes that remain prime through 5 iterations of function f(x) = 2x + 5. A23332

Numerators of continued fraction convergents to sqrt(651). A42250

Restricted left truncatable (Henry VIII) primes. A55521

Primes p of the form m² + 27. A227622

Number triangle read by rows: T(n,k) = ∑_j=0..n-k C(n+j,j+k)*C(n-j,k). A117207

Left-truncatable primes p with property that prepending any single decimal digit to p does not produce a prime. A240768

Minimal index of order n Stanley's antimagic square composed of Smith numbers. A225133

Twin primes with both terms having distinct digits in descending order. A261511

a(n) = a(n-7) + a(n-4) + a(n-1) for n>1 and a(n)=1 for n<=1. A262602