Properties of the Number 1723

One Thousand Seven Hundred Twenty-Three

Basics

Value: 1722 → 1723 → 1724

Parity: odd

Prime: Yes

Previous Prime: 1721

Next Prime: 1733

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 1723

Divisors: 1, 1723

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 11010111011

Octal: 3273

Duodecimal: BB7

Hexadecimal: 6bb

Square: 2968729

Square Root: 41.50903516103452

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Central polygonal numbers: a(n) = n² - n + 1. A2061

Half the number of 3 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side. A69448

Primes of the form 1 + n + n² + n³ + ... + n^k, n > 1, k > 1. A85104

Sum of divisors of square numbers. A65764

Primes of form k² + k + 1. A2383

Number of twice-partitions of type (Q,P,Q) and weight n. A279790

Number of sublattices of index n in generic 3-dimensional lattice. A1001

Discriminants of imaginary quadratic fields with class number 5 (negated). A46002

a(n) = 4·n² - 10·n + 7. A54554

a(n) = least m such that if a/b < c/d where a,b,c,d are integers in [0,n], then a/b < k/m < c/d for some integer k. A1000