Properties of the Number 27918

Twenty-Seven Thousand Nine Hundred Eighteen

Basics

Value: 27917 → 27918 → 27919

Parity: even

Prime: No

Previous Prime: 27917

Next Prime: 27919

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 11 × 47

Divisors: 1, 2, 3, 6, 9, 11, 18, 22, 27, 33

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110100001110

Octal: 66416

Duodecimal: 141A6

Hexadecimal: 6d0e

Square: 779414724

Square Root: 167.08680378773184

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

Triangle related to the divergent series 1^m*1! - 2^m*2! + 3^m*3! - 4^m*4! + ... for m >= -1. A163940

Sum of the squared parts of the partitions of n into exactly two parts. A226141

Numbers on the square spiral board that are enclosed by four primes. A341542

Fifth right hand column of triangle A163940. A163942

Numbers k such that in a rotated-square spiral with positive integers (A215468) among k's eight nearest neighbors five or more are primes. A215471

Triangle read by rows: T(n,m) (n >= 1, 1 <= m <= n) = number of set partitions of [n], avoiding 123454, with m blocks. A250119

Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral. A172294

Upper (1/3,1/2) midsequence of (n²) and (n³); see Comments. A390566

Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,7. A64240

a(n) = digit reversal of A103741(n). A103763