508705 has 4 divisors (see below), whose sum is σ = 610452. Its totient is φ = 406960.

The previous prime is 508693. The next prime is 508709. The reversal of 508705 is 507805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507805 = 5 ⋅101561.

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 451584 = 239^2 + 672^2 .

It is not a de Polignac number, because 508705 - 2⁷ = 508577 is a prime.

It is a Duffinian number.

508705 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 508705.

It is not an unprimeable number, because it can be changed into a prime (508709) 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, 50866 + ... + 50875.

It is an arithmetic number, because the mean of its divisors is an integer number (152613).

2⁵⁰⁸⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

508705 is a deficient number, since it is larger than the sum of its proper divisors (101747).

508705 is a wasteful number, since it uses less digits than its factorization.

508705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101746.

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

The square root of 508705 is about 713.2355852031. The cubic root of 508705 is about 79.8280159502.

Subtracting from 508705 its reverse (507805), we obtain a square (900 = 30²).

The spelling of 508705 in words is "five hundred eight thousand, seven hundred five".