Properties of the Number 469

Four Hundred Sixty-Nine

Basics

Value: 468 → 469 → 470

Parity: odd

Prime: No

Previous Prime: 467

Next Prime: 479

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 67

Divisors: 1, 7, 67, 469

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: 111010101

Octal: 725

Duodecimal: 331

Hexadecimal: 1d5

Square: 219961

Square Root: 21.656407827707714

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

Hex (or centered hexagonal) numbers: 3·n*(n+1)+1 (crystal ball sequence for hexagonal lattice). A3215

Heptagonal numbers (or 7-gonal numbers): n*(5·n-3)/2. A566

Triangle T(n,k) read by rows: T(n,k) is the number of compositions of n with k descents, n>=0, 0<=k<=n. A238343

Numbers k such that k! - 1 is prime. A2982

Generalized heptagonal numbers: m*(5·m - 3)/2, m = 0, +-1, +-2 +-3, ... A85787

a(n) = C(n,1) + C(n,2) + C(n,3), or n*(n² + 5)/6. A4006

Triangle read by rows where T(n,k) is the number of compositions of n > 0 with runs-resistance k, 0 <= k <= n - 1. A329744

Number of partitions of n into at most 1 copy of 1, 2 copies of 2, 3 copies of 3, ... . A52335

a(n) = A064989(σ(A003961(n))), where A003961 shifts the prime factorization of n one step towards larger primes, and A064989 shifts it back towards smaller primes. A326042

Partial sums of A299257. A299263