Properties of the Number 26891

Twenty-Six Thousand Eight Hundred Ninety-One

Basics

Value: 26890 → 26891 → 26892

Parity: odd

Prime: Yes

Previous Prime: 26881

Next Prime: 26893

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 26891

Divisors: 1, 26891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110100100001011

Octal: 64413

Duodecimal: 1368B

Hexadecimal: 690b

Square: 723125881

Square Root: 163.98475538903

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) = prime(n)*prime(n+1) - prime(n) - prime(n+1). A37165

Odd primes p such that the number of primes less than p that are congruent to 1 (mod 4) is equal to the number of primes less than p that are congruent to 3 (mod 4). A96447

Primes of the form p·q - p - q, where p and q are two successive primes. A96345

First primes of arithmetic progressions of 5 primes each with the common difference 30. A227281

Primes of form k² - 5. A28877

Fixed points for prime number permutation A108546. A108547

Primes that are (product minus sum) of a sequence of consecutive primes. A390933

Discriminants of imaginary quadratic fields with class number 41 (negated). A351679

Powers of fifth root of 17 rounded down. A18162

Primes that are no longer prime if in their binary representation any single bit is flipped but stay prime if a 1 bit is prepended. A385245