Properties of the Number 39685

Thirty-Nine Thousand Six Hundred Eighty-Five

Basics

Value: 39684 → 39685 → 39686

Parity: odd

Prime: No

Previous Prime: 39679

Next Prime: 39703

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 7937

Divisors: 1, 5, 7937, 39685

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101100000101

Octal: 115405

Duodecimal: 1AB71

Hexadecimal: 9b05

Square: 1574899225

Square Root: 199.21094347449892

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

n+p(n)+p(p(n)) is a square, where p(n) is the n-th prime. A116011

Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order. A222473

a(n) is the least number that reaches 1 after n iterations of the infinitary totient function A064380. A362025

Numbers m such that m² ends in 444. A39685

T(n,k)=Number of nXk 0..3 arrays with no more than floor(nXk/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order. A222479

Number of terms in the set InvPhi(1024·prime(n)), where prime(n) is the n-th prime. A71632