806503 has 2 divisors, whose sum is σ = 806504. Its totient is φ = 806502.

The previous prime is 806483. The next prime is 806513. The reversal of 806503 is 305608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 806503 - 2⁹ = 805991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403251 + 403252.

It is an arithmetic number, because the mean of its divisors is an integer number (403252).

2⁸⁰⁶⁵⁰³ is an apocalyptic number.

806503 is a deficient number, since it is larger than the sum of its proper divisors (1).

806503 is an equidigital number, since it uses as much as digits as its factorization.

806503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 806503 is about 898.0551208027. The cubic root of 806503 is about 93.0826336122.

Adding to 806503 its reverse (305608), we get a palindrome (1112111).

The spelling of 806503 in words is "eight hundred six thousand, five hundred three".