Properties of the Number 71391

Seventy-One Thousand Three Hundred Ninety-One

Basics

Value: 71390 → 71391 → 71392

Parity: odd

Prime: No

Previous Prime: 71389

Next Prime: 71399

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 53 × 449

Divisors: 1, 3, 53, 159, 449, 1347, 23797, 71391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011011011111

Octal: 213337

Duodecimal: 35393

Hexadecimal: 116df

Square: 5096674881

Square Root: 267.1909429602733

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

Triangular matrix T, read by rows, that satisfies: SHIFT_LEFT(column 0 of T^(3·p-1/3)) = (3·p-1)*(column p of T), or [T^(3·p-1/3)](m,0) = (3·p-1)*T(p+m,p) for all m>=1 and p>=0. A107717

Replace 2n+1 with concatenation of its divisors >1. A37287

Numbers k that divide the k-th Apéry number (A005258). A372943

Least number m such that σ(m) + φ(m) = n or 0 if no such number exists. A71391