Properties of the Number 30987

Thirty Thousand Nine Hundred Eighty-Seven

Basics

Value: 30986 → 30987 → 30988

Parity: odd

Prime: No

Previous Prime: 30983

Next Prime: 31013

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 11 × 313

Divisors: 1, 3, 9, 11, 33, 99, 313, 939, 2817, 3443

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100100001011

Octal: 74413

Duodecimal: 15B23

Hexadecimal: 790b

Square: 960194169

Square Root: 176.0312472261672

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

Numbers k such that σ(k-φ(k)) = φ(k). A70170

a(n) = 121·n² + 11. A158536

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 32. A31710

Numbers k such that the product of the first k primes minus the (k+1)-th prime is prime. A249798

4-automorphic numbers: final digits of 4·n² agree with n. A30987