Properties of the Number 1663

One Thousand Six Hundred Sixty-Three

Basics

Value: 1662 → 1663 → 1664

Parity: odd

Prime: Yes

Previous Prime: 1657

Next Prime: 1667

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 1663

Divisors: 1, 1663

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001111111

Octal: 3177

Duodecimal: B67

Hexadecimal: 67f

Square: 2765569

Square Root: 40.779897008207364

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 5^k - 4^k is prime. A59802

Number of partitions of n in which no part occurs just once. A7690

Primes of the form 7x²+4xy+52y². A140633

Primes whose decimal representation is a valid number in base 8 and interpreted as such is again a prime. A235394

Initial members of prime triples (p, p+4, p+6). A22005

Prime triples: p; p+2 or p+4; p+6 all prime. A7529

V-toothpick (or honeycomb) sequence (see Comments lines for definition). A161206

Numbers k such that (3^k + 1)/4 is prime. A7658

Primes of the form 16n+15. A127576

Primes p such that 4p² + 1 is also prime. A52291