605686 has 4 divisors (see below), whose sum is σ = 908532. Its totient is φ = 302842.

The previous prime is 605641. The next prime is 605687. The reversal of 605686 is 686506.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686506 = 2 ⋅343253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151420 + ... + 151423.

It is an arithmetic number, because the mean of its divisors is an integer number (227133).

2⁶⁰⁵⁶⁸⁶ is an apocalyptic number.

605686 is a deficient number, since it is larger than the sum of its proper divisors (302846).

605686 is a wasteful number, since it uses less digits than its factorization.

605686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302845.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 605686 is about 778.2583118734. The cubic root of 605686 is about 84.6088603149.

The spelling of 605686 in words is "six hundred five thousand, six hundred eighty-six".