Properties of the Number 39973

Thirty-Nine Thousand Nine Hundred Seventy-Three

Basics

Value: 39972 → 39973 → 39974

Parity: odd

Prime: No

Previous Prime: 39971

Next Prime: 39979

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 71 × 563

Divisors: 1, 71, 563, 39973

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110000100101

Octal: 116045

Duodecimal: 1B171

Hexadecimal: 9c25

Square: 1597840729

Square Root: 199.93248860552904

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

Apocalypse primes: 10⁶⁶⁵+a(n) has 666 decimal digits and is prime. A115983

Numbers k such that 7·10^k + 4·R_k - 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A103058

Begin with a(0) = 3. Let a(n) for n > 0 be the smallest positive integer not yet in the sequence which forms part of a Primitive Pythagorean Triple (PPT) when paired with a(n-1). A239356

Number of length 3+2 0..n arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero. A250562

Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A254899

An example of a d-perfect sequence: a(2·n) = 0, a(2·n-1) = A039965(n). A39973