Properties of the Number 81023

Eighty-One Thousand Twenty-Three

Basics

Value: 81022 → 81023 → 81024

Parity: odd

Prime: Yes

Previous Prime: 81019

Next Prime: 81031

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 81023

Divisors: 1, 81023

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10011110001111111

Octal: 236177

Duodecimal: 3AA7B

Hexadecimal: 13c7f

Square: 6564726529

Square Root: 284.64539342838486

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(1) = 2; a(n+1) is the smallest prime > a(n) which differs from it in every digit. A68853

a(n) is the smallest positive integer not yet in the increasing sequence that is obtained when the largest digit from a(n-1) is deleted and the remaining digits are permuted such that no digit in a(n) has the same position it had in a(n-1) (counting from left to right). No repeated digits allowed; a(1)=10. A302095

Sequence based on wholly inaccurate version of Aronson's sentence (cf. A005224): "T is the second, third, fifth, sixth, seventh . . . letter of this sentence, not counting commas or spaces", where the sentence indicates exactly those letters that are not "T"s. A81023