Properties of the Number 39907

Thirty-Nine Thousand Nine Hundred Seven

Basics

Value: 39906 → 39907 → 39908

Parity: odd

Prime: No

Previous Prime: 39901

Next Prime: 39929

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7 × 5701

Divisors: 1, 7, 5701, 39907

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101111100011

Octal: 115743

Duodecimal: 1B117

Hexadecimal: 9be3

Square: 1592568649

Square Root: 199.76736470204537

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

a(n) = ∑_k=0..n 6^k*N(n,k), with a(0)=1, where N(n,k) = C(n,k) * C(n,k+1)/n are the Narayana numbers (A001263). A78018

a(n) = N(6,n), where N(6,x) is the 6th Narayana polynomial. A90199

Numbers n such that φ(n) = φ(n+12) and n is not divisible by 2. A217141

a(n) = P(n, 1, -2·n-1, 1-2·n)/(n+1), P the Jacobi polynomial. A242369

Strong pseudoprimes to base 76. A20302

Number of nX5 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 1,4,3,2,0 for x=0,1,2,3,4. A196926

Table T(n,k), n>=0 and k>=0, read by antidiagonals: the k-th column given by the k-th Narayana polynomial. A8550

Square array of Narayana polynomials N_n evaluated at the integers, A(n,k) = N_n(k), n>=0, k>=0, read by antidiagonals. A243631

a(n) = 6^{(n² - n}/2). A109354

T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 1,4,3,2,0 for x=0,1,2,3,4. A196929