505807 has 4 divisors (see below), whose sum is σ = 514440. Its totient is φ = 497176.

The previous prime is 505781. The next prime is 505811. The reversal of 505807 is 708505.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505807 is a prime.

It is a Duffinian number.

505807 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505867) 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, 4228 + ... + 4345.

It is an arithmetic number, because the mean of its divisors is an integer number (128610).

2⁵⁰⁵⁸⁰⁷ is an apocalyptic number.

505807 is a deficient number, since it is larger than the sum of its proper divisors (8633).

505807 is an equidigital number, since it uses as much as digits as its factorization.

505807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 505807 is about 711.2010967371. The cubic root of 505807 is about 79.6761386084.

The spelling of 505807 in words is "five hundred five thousand, eight hundred seven".