Properties of the Number 27971

Twenty-Seven Thousand Nine Hundred Seventy-One

Basics

Value: 27970 → 27971 → 27972

Parity: odd

Prime: No

Previous Prime: 27967

Next Prime: 27983

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 83 × 337

Divisors: 1, 83, 337, 27971

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110101000011

Octal: 66503

Duodecimal: 1422B

Hexadecimal: 6d43

Square: 782376841

Square Root: 167.24532878379594

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

Expansion of exp( ∑_{n >= 1} A188458(n)*xⁿ/n ). A188514

NSW pseudoprimes: odd composite numbers k such that A002315((k-1)/2) == 1 (mod k). A330276

Pell pseudoprimes: odd composite numbers n such that P(n)-Kronecker(2,n) is divisible by n. A99011

All 81 combinations of prefixing and following a(n) by a single digit are nonprime. A32734

Intersection of A099011 and A327651. A327652

Composite numbers k coprime to 8 such that k divides Pell(k - Kronecker(8,k)), Pell = A000129. A327651

Extra strong Lucas pseudoprimes. A217719

Composite numbers k such that Pell(k) == -1 (mod k). A319043

Number of n-node rooted identity trees of height 6. A38090

Number of peaks at odd level in all Dyck paths of semilength n that have no ascents and no descents of length 1. A167636