Properties of the Number 1669

One Thousand Six Hundred Sixty-Nine

Basics

Value: 1668 → 1669 → 1670

Parity: odd

Prime: Yes

Previous Prime: 1667

Next Prime: 1693

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 1669

Divisors: 1, 1669

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010000101

Octal: 3205

Duodecimal: B71

Hexadecimal: 685

Square: 2785561

Square Root: 40.85339643163099

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(0)=2; for n>=1, a(n) = smallest prime p such that there is a gap of exactly 2n between p and next prime, or -1 if no such prime exists. A230

Number of "ON" cells at n-th stage in the "Ulam-Warburton" two-dimensional cellular automaton. A147562

Primes whose binary representation is also the decimal representation of a prime. A65720

Primes whose base-2 representation is also the base-3 representation of a prime. A235266

Number of combinations which can be taken from the integer partitions of n. Total number of cases in the (n,m)-fragmentation process. A122768

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 4.8.8 2D tiling (cf. A008576). A299259

Primes that become a different prime under the mapping 7 <=> 9. A180559

Primes with only nonprime decimal digits. A34844

Primes p such that a pure prime power occurs between p and the next prime. A53607

Primes of the form x² + 45y². A107152