Properties of the Number 39391

Thirty-Nine Thousand Three Hundred Ninety-One

Basics

Value: 39390 → 39391 → 39392

Parity: odd

Prime: No

Previous Prime: 39383

Next Prime: 39397

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 11 × 3581

Divisors: 1, 11, 3581, 39391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001100111011111

Octal: 114737

Duodecimal: 1A967

Hexadecimal: 99df

Square: 1551650881

Square Root: 198.47166044551548

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

First row of spectral array W(γ+1). A250253

Strong pseudoprimes to base 86. A20312

The sum of the elements in the first, middle and last row of the n-th power of the 9-by-9 matrix defined in the formula. A134326

Semiprimes formed by concatenating n, n, and 1 for n = 1, 2, 3,.... A210711

Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 6. A154056

G.f. satisfies: A(x,y) = 1 + ∑_n>=1 xⁿ*y·A(x,y)ⁿ/(1 - y·A(x,y)^2·n), where A(x,y) = 1 + ∑_n>=1,k>=1 T(n,k)*xⁿ*y^k; here the coefficients T(n,k) form a square array and are read by antidiagonals. A192404

Numbers whose base-9 representation has the same nonzero number of 6's and 8's. A39391