Properties of the Number 93

Ninety-Three

Basics

Value: 92 → 93 → 94

Parity: odd

Prime: No

Previous Prime: 89

Next Prime: 97

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 31

Divisors: 1, 3, 31, 93

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011101

Octal: 135

Duodecimal: 79

Hexadecimal: 5d

Square: 8649

Square Root: 9.643650760992955

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) = σ(n), the sum of the divisors of n. Also called sigma₁(n). A203

Squarefree numbers: numbers that are not divisible by a square greater than 1. A5117

Semiprimes (or biprimes): products of two primes. A1358

Expansion of ∏_k>=0 (1 + x^2k+1); number of partitions of n into distinct odd parts; number of self-conjugate partitions; number of symmetric Ferrers graphs with n nodes. A700

The odd numbers: a(n) = 2·n + 1. A5408

Completely multiplicative with a(prime(k)) = prime(k+1). A3961

Read n backwards (referred to as R(n) in many sequences). A4086

Numbers k such that (16·10^k - 31)/3 is prime. A270929

Squarefree semiprimes: Numbers that are the product of two distinct primes. A6881

EKG sequence (or ECG sequence): a(1) = 1; a(2) = 2; for n > 2, a(n) = smallest number not already used which shares a factor with a(n-1). A64413

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