Properties of the Number 27987

Twenty-Seven Thousand Nine Hundred Eighty-Seven

Basics

Value: 27986 → 27987 → 27988

Parity: odd

Prime: No

Previous Prime: 27983

Next Prime: 27997

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 19 × 491

Divisors: 1, 3, 19, 57, 491, 1473, 9329, 27987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 110110101010011

Octal: 66523

Duodecimal: 14243

Hexadecimal: 6d53

Square: 783272169

Square Root: 167.29315586717826

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

Consecutive states of the linear congruential pseudo-random number generator (31481·s+21139) mod 10⁵ when started at s=1. A384341

Distance from 2ⁿ to the nearest base-10 palindrome. A393111

Number of binary rooted trees with n nodes and height exactly 12. A36601

Number of primitive (aperiodic) reversible strings with n beads using exactly three different colors. A56319

a(n) = smallest number k such that 2ⁿ + k is a palindrome. A83463

Poincaré series for hyperbolic reflection group with Coxeter diagram shown in Comments. A265052

a(n) is the lowest number in the sequence of the first occurrence of exactly n consecutive numbers with at least one repeated digit, or -1 if no such number exists. A337707

Numbers k such that (94·10^k + 11)/3 is prime. A280019

a(n) = ∑_k=0..2·n-3 T(n, k)*T(n, k+3), T given by A027960. A27987