Properties of the Number 13669

Thirteen Thousand Six Hundred Sixty-Nine

Basics

Value: 13668 → 13669 → 13670

Parity: odd

Prime: Yes

Previous Prime: 13649

Next Prime: 13679

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 13669

Divisors: 1, 13669

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010101100101

Octal: 32545

Duodecimal: 7AB1

Hexadecimal: 3565

Square: 186841561

Square Root: 116.91449867317569

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

Cuban primes: primes which are the difference of two consecutive cubes. A2407

Sum of n-th prime squared and n-th perfect square. A106587

a(n) = 12·n² + 18·n + 7. A154105

5-Ramanujan primes; the interval (x/2,x] has at least n 4-Ramanujan primes for x >= a(n) but not for x = a(n)-1. A192823

Number T(n,k) of n-step walks on cubic lattice starting at (0,0,0), ending at (0,k,n-k), remaining in the first (nonnegative) octant and using steps (0,0,1), (0,1,0), (1,0,0), (-1,1,1), (1,-1,1), and (1,1,-1); triangle T(n,k), n>=0, 0<=k<=n, read by rows. A328300

Solution of the complementary equation a(n) = 2·a(n-1) + a(n-2) + b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, and (a(n)) and (b(n)) are increasing complementary sequences. A295143

Primes p such that the sum of the digits of p is not prime, but the sum of the squares of the digits of p is prime. A91362

Primes congruent to 16 mod 37. A142125

Standard Jacobi primes. A275878

Numbers k such that 2^k+1 - k - 2 is prime. A63791