Properties of the Number 19939

Nineteen Thousand Nine Hundred Thirty-Nine

Basics

Value: 19938 → 19939 → 19940

Parity: odd

Prime: No

Previous Prime: 19937

Next Prime: 19949

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 127 × 157

Divisors: 1, 127, 157, 19939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111100011

Octal: 46743

Duodecimal: B657

Hexadecimal: 4de3

Square: 397563721

Square Root: 141.20552397126679

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

Numbers that are the sum of 4 nonzero 8th powers. A3382

Number of multiset partitions of integer partitions of n with all distinct block sizes. A358836

Number of maximal subsets of {1..n} of which every subset has a different sum. A325865

Numbers that are the sum of at most 4 nonzero 8th powers. A4877

Area of consecutive Prime-Indexed Prime rectangles. A119658

Numbers n such that n and its reversal are distinct brilliant numbers (A078972). A97435

Lesser of 2 successive squarefree semiprimes (k, k+6) sandwiching 5 consecutive nonsquarefree numbers. A368778

a(n) = |{0 < k <= n: the number of twin prime pairs not exceeding k·n is a square}|. A237840

G.f.: ∑_n>=0 (2 + (1+x)ⁿ)ⁿ / (3 + (1+x)ⁿ)ⁿ⁺¹. A302614

Decimal expansion of tangent of 41 degrees. A19939