605690 has 16 divisors (see below), whose sum is σ = 1120392. Its totient is φ = 235584.

The previous prime is 605687. The next prime is 605707. The reversal of 605690 is 96506.

It can be written as a sum of positive squares in 4 ways, for example, as 444889 + 160801 = 667^2 + 401^2 .

It is a super-2 number, since 2×605690² = 733720752200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 449 + ... + 1188.

2⁶⁰⁵⁶⁹⁰ is an apocalyptic number.

605690 is a deficient number, since it is larger than the sum of its proper divisors (514702).

605690 is a wasteful number, since it uses less digits than its factorization.

605690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 605690 is about 778.2608817100. The cubic root of 605690 is about 84.6090465691.

The spelling of 605690 in words is "six hundred five thousand, six hundred ninety".