505783 has 4 divisors (see below), whose sum is σ = 513400. Its totient is φ = 498168.

The previous prime is 505781. The next prime is 505811. The reversal of 505783 is 387505.

505783 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505783 - 2¹ = 505781 is a prime.

It is a Duffinian number.

505783 is an undulating number in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3708 + ... + 3841.

It is an arithmetic number, because the mean of its divisors is an integer number (128350).

2⁵⁰⁵⁷⁸³ is an apocalyptic number.

505783 is a deficient number, since it is larger than the sum of its proper divisors (7617).

505783 is an equidigital number, since it uses as much as digits as its factorization.

505783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 505783 is about 711.1842236720. The cubic root of 505783 is about 79.6748784060.

The spelling of 505783 in words is "five hundred five thousand, seven hundred eighty-three".