Properties of the Number 39401

Thirty-Nine Thousand Four Hundred One

Basics

Value: 39400 → 39401 → 39402

Parity: odd

Prime: No

Previous Prime: 39397

Next Prime: 39409

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 31 ² × 41

Divisors: 1, 31, 41, 961, 1271, 39401

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001100111101001

Octal: 114751

Duodecimal: 1A975

Hexadecimal: 99e9

Square: 1552438801

Square Root: 198.4968513604183

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) = (prime(1+n)*prime(n)) + prime(n) + 1. A286624

Pell equation solutions (7·a(n))² - 2*(5·b(n))² = -1 with b(n):=A097733(n), n >= 0. Note that D=50=2·5² is not squarefree. A97732

Triangle T(n,k), n >= 2, 0 <= k <= floor(n²/2)-n, read by rows, where T(n,k) is the number of 2*(k+n)-cycles in the n X n grid graph which pass through NW and SW corners. A333652

Maximal non-semiprime number which is a "preprime" of the n-th kind (defined in comment in A247395). A247834

Denominators of continued fraction convergents to sqrt(98). A41177

Denominators of continued fraction convergents to sqrt(392). A41745

Denominators of continued fraction convergents to sqrt(882). A42705

Smallest number k with A355915(k) = n. A356792

Greatest positive integer whose weakly increasing prime indices have zero-based weighted sum (A359674) equal to n. A359757

p²-p-1 that is not prime, where p is prime. A119609