Properties of the Number 91001

Ninety-One Thousand One

Basics

Value: 91000 → 91001 → 91002

Parity: odd

Prime: No

Previous Prime: 90997

Next Prime: 91009

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 17 × 53 × 101

Divisors: 1, 17, 53, 101, 901, 1717, 5353, 91001

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110001101111001

Octal: 261571

Duodecimal: 447B5

Hexadecimal: 16379

Square: 8281182001

Square Root: 301.66372005927394

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

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

Fermat pseudoprimes to base 2 with three prime factors. A215672

G.f.: (1 + x³ + x⁴ + ... + x¹² + x¹⁵)/∏_i=1..10 (1 - xⁱ). A3403

Numbers m such that exactly half of the a such that 0<a<m and (a,m)=1 satisfy a^m-1 == 1 (mod m). A191311

Numbers in A191311 but not in A129521. A191592

Sarrus numbers n (A001567) which satisfy μ(n) = -1 and which are not Super-Poulet numbers (A050217). A74380

Numbers k such that 2^k-1 == 1 (mod k) and lpf(k)-1 does not divide k-1. A316906

Strong pseudoprimes to base 55. A20281

Strong pseudoprimes to base 72. A20298

Strong pseudoprimes to base 98. A20324