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Properties of the Number -1817

Eight Hundred Seventeen

Basics

Value: -1818 → -1817 → -1816

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 23 × 79

Divisors: 1, 23, 79, 1817

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -11100011001

Octal: -3431

Duodecimal: -1075

Hexadecimal: -719

Square: 3301489

Square Root: 42.62628297189423

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

Poly-Cauchy numbers of the second kind hat cn-5. A223904
Number of integer partitions of n without an alternating permutation. A345165
Numbers that are the sum of 6 positive 5th powers. A3351
Total number of toothpicks in the toothpick structure A139250 that are parallel to the initial toothpick, after n odd rounds. A162795
Number of partitions of n into distinct parts (a1, a2, ... , am) (a1 > a2 > ... > am and ∑k=1..m ak = n) such that a1 - a2, a2 - a3, ..., am-1 - am are different. A320347
L-toothpick sequence (see Comment lines for definition). A172310
Numbers that when divided by the sum of their digits leave 15 as remainder. A341182
MM-numbers of nesting multiset partitions. A326256
Numbers k such that k and k + 1 are both Niven numbers in base 3/2 (A342426). A342427
Numbers k such that σ(k) = σ(k+12). A15882