Properties of the Number -1309

Three Hundred Nine

Basics

Value: -1310 → -1309 → -1308

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 11 × 17

Divisors: 1, 7, 11, 17, 77, 119, 187, 1309

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10100011101

Octal: -2435

Duodecimal: -911

Hexadecimal: -51d

Square: 1713481

Square Root: 36.180105030251084

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

Expansion of (1-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 7. A60026

Expansion of ((1-4·x) + sqrt(1-4·x))/(2*(1-2·x)). A158495

1-gonal pyramidal numbers. A254749

Triangle T(n,k) read by rows: coefficient [x^k] of the polynomial ∑_{k=0..infinity} (2·k+1)ⁿ*binomial(x,k) / 2^x. A176668

Triangle, read by rows, T(n, k) = p(n)/(p(k)*p(n-k)), where p(n) = ∏_j=1..n A001607(j). A177693

Array of higher-order differences of the sequence (-1)ⁿ*A000111(n) read by downward antidiagonals. A261880

Number of Look-and-Say partitions of n; see Comments. A239455

Boustrophedon transform of all-1's sequence. A667

Number of partitions of n of order n. A74761

Fibonacci sequence beginning 1, 5. A22095