Properties of the Number 31684

Thirty-One Thousand Six Hundred Eighty-Four

Basics

Value: 31683 → 31684 → 31685

Parity: even

Prime: No

Previous Prime: 31667

Next Prime: 31687

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 89 ²

Divisors: 1, 2, 4, 89, 178, 356, 7921, 15842, 31684

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101111000100

Octal: 75704

Duodecimal: 16404

Hexadecimal: 7bc4

Square: 1003875856

Square Root: 178

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

Number of n X 2 0..1 arrays avoiding the patterns 0 1 0 or 1 0 1 in any row, column, diagonal or antidiagonal. A206981

a(n) = (6·n + 4)². A16958

Squares with initial digit '3'. A45786

Squares whose product of digits is also a nonzero square. A53059

Numbers k such that φ(k) + σ(k) is a prime. A38344

a(n) = (prime(n) - 1)². A5722

a(n) = (5·n + 3)². A16886

Squares ending in digit 4. A273375

a(n) = 4·prime(n)². A69262

Let A={2,4,5,8,9,11,14,...} be the sequence of numbers k>=1 such that k+1 is evil (A001969), and let B be the complement of A. The sequence lists numbers for which number of A-divisors equals number of B-divisors. A231175