Properties of the Number 71983

Seventy-One Thousand Nine Hundred Eighty-Three

Basics

Value: 71982 → 71983 → 71984

Parity: odd

Prime: Yes

Previous Prime: 71971

Next Prime: 71987

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 71983

Divisors: 1, 71983

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001100100101111

Octal: 214457

Duodecimal: 357A7

Hexadecimal: 1192f

Square: 5181552289

Square Root: 268.29647780021264

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

Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 1,3. A37578

Numerator of Sum[ (-1)^k+1 * 1/p(k)^p(k), {k,1,n}], where p(k) = Prime[k]. A122148

a(n) = ∏_i=1..n prime(i)^prime(i). A76265

Square chains: the number of permutations (reversals not counted as different) of the numbers 1 to n such that the sum of any two consecutive numbers is a square. A71983

Decimal expansion of Sum[ (-1)^k+1 * 1/p(k)^p(k) ], where p(k) = Prime[k]. A122147