Properties of the Number 70171

Seventy Thousand One Hundred Seventy-One

Basics

Value: 70170 → 70171 → 70172

Parity: odd

Prime: No

Previous Prime: 70163

Next Prime: 70177

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 47 × 1493

Divisors: 1, 47, 1493, 70171

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001001000011011

Octal: 211033

Duodecimal: 34737

Hexadecimal: 1121b

Square: 4923969241

Square Root: 264.8980936133743

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

a(n) is defined by the condition that the decimal expansion of the ∑_n>=1 1/(n·a(n)) = 1/(1·a(1)) + 1/(2·a(2)) + 1/(3·a(3)) + ... begins with the concatenation of these numbers; also a(1) = 3 and a(n) > a(n-1). A307007

a(1) = 1; for n > 1, a(n) is the least k > a(n-1) such that a(n) + a(n-1) is square and a(n) - a(n-1) is prime. A108972

Numbers k such that σ(φ(k)) = k-φ(k). A70171