Properties of the Number 63405

Sixty-Three Thousand Four Hundred Five

Basics

Value: 63404 → 63405 → 63406

Parity: odd

Prime: No

Previous Prime: 63397

Next Prime: 63409

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 1409

Divisors: 1, 3, 5, 9, 15, 45, 1409, 4227, 7045, 12681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111011110101101

Octal: 173655

Duodecimal: 30839

Hexadecimal: f7ad

Square: 4020194025

Square Root: 251.80349481291955

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(n) is the number of nonnegative integers that can be represented in a 7-segment display by using only n segments (version A006942). A331529

Strong pseudoprimes to base 46. A20272

Numbers k with at least one nonpalindromic divisor such that the sum of φ(d) = the sum of φ(reverse(d)), where d runs over the divisors of k and φ is the Euler totient function. A246545

a(n) is the n-th derivative of arcsinh(1/x) at x=1 times (-2)ⁿ/sqrt(2) for n >= 1. A300793

Numbers k such that the binary reversal of k (A030101) is equal to the sum of the proper divisors of k (A001065). A329663

T(n,m) for positive n,m is the first integer we get when iterating f starting with f(n/m), where function f on rationals is defined as f(p/q)=abs(p-q)/NextOddCollatz(p)(we assume p,q coprime), where NextOddCollatz(p) is the next odd number that is found in the Collatz trajectory of p. When no integer is reached by iteration, T(n,m)=0. A63405