Properties of the Number 27961

Twenty-Seven Thousand Nine Hundred Sixty-One

Basics

Value: 27960 → 27961 → 27962

Parity: odd

Prime: Yes

Previous Prime: 27953

Next Prime: 27967

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 27961

Divisors: 1, 27961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110100111001

Octal: 66471

Duodecimal: 14221

Hexadecimal: 6d39

Square: 781817521

Square Root: 167.2154299100415

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

Largest prime factor of the "repunit" number 11...1 (cf. A002275). A3020

Triangle of prime numbers in which n-th row lists all primes p such that 1/p has decimal period n, n >= 1. A46107

Largest prime factor of 10ⁿ - 1. A5422

a(n) = largest prime factor of nⁿ + 1. A7571

Primes of form n² + 20736. A256840

a(n) in base n is the concatenation of the base n expansions of (1, 2, 3, ..., n-1, n, n-1, ..., 3, 2, 1). A260851

Largest prime factor of 10ⁿ + 1. A3021

Primes in A260851: numbers whose base n expansion is equal to the concatenation of the base n expansions of (1, 2, 3, ..., n-1, n, n-1, ..., 3, 2, 1). A260852

Greatest prime number p(n) with decimal fraction period of length n. A61075

a(n) = n³ + (n+1)². A100705