Properties of the Number 65423

Sixty-Five Thousand Four Hundred Twenty-Three

Basics

Value: 65422 → 65423 → 65424

Parity: odd

Prime: Yes

Previous Prime: 65419

Next Prime: 65437

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 65423

Divisors: 1, 65423

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1111111110001111

Octal: 177617

Duodecimal: 31A3B

Hexadecimal: ff8f

Square: 4280168929

Square Root: 255.77920165642865

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

Primes p such that the decimal expansion of p remains prime under two iterations of base-10 to base-2 conversions. A123266

a(n) = ∑_k=1..n (-2)^floor(n/k - 1). A345034

a(n) is a binary encoded version of A355057(n). A354765

Primes that remain prime through 4 iterations of function f(x) = 9x + 4. A23325

Primes formed by rearranging five consecutive decimal digits (avoiding leading 0). A156119

Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+x+y>2. A211614

Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 n X 2 array. A219167

Largest prime arising that can be formed by stringing together the decimal expansions of some or all of the first n numbers in some order. A113030

Number of ordered length 2 compositions of n with at least one even summand. A65423

Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5. A251903