Properties of the Number 17993

Seventeen Thousand Nine Hundred Ninety-Three

Basics

Value: 17992 → 17993 → 17994

Parity: odd

Prime: No

Previous Prime: 17989

Next Prime: 18013

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 19 × 947

Divisors: 1, 19, 947, 17993

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011001001001

Octal: 43111

Duodecimal: A4B5

Hexadecimal: 4649

Square: 323748049

Square Root: 134.1379886534758

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

Composite numbers whose divisors (except 1) all contain the digit 9. A62680

a(1) = 0, a(2) = 1, and for n > 2, a(n) = 2·a(A252463(n)) + [n == 1 (mod 2)]*[J(3∣n) == 1], where J is the Jacobi-symbol. A292253

Number of compositions (ordered partitions) of n into distinct parts >= 7. A339108

Least semiprime m such that the previous semiprime is m - A215231(n). A217851

Numbers with ordered partitions that have periods of length 5. A178572

Numbers k such that 219·2^k+1 is prime. A32486

Number of minimal edge covers in the n-wheel graph. A290471

Triangle read by rows: T(n,k) is the number of Motzkin paths of length n having k low humps. (A hump is an upstep followed by 0 or more flatsteps followed by a downstep. A low hump is a hump that starts at level zero.). A97887

Powers of cube root of 6 rounded up. A17993

a(n) is the smallest semiprime such that difference between a(n) and next semiprime, b(n), is n. A131109