609658 has 12 divisors (see below), whose sum is σ = 1063962. Its totient is φ = 261240.

The previous prime is 609641. The next prime is 609673. The reversal of 609658 is 856906.

It can be written as a sum of positive squares in only one way, i.e., 603729 + 5929 = 777^2 + 77^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3013 + ... + 3208.

2⁶⁰⁹⁶⁵⁸ is an apocalyptic number.

609658 is a deficient number, since it is larger than the sum of its proper divisors (454304).

609658 is a wasteful number, since it uses less digits than its factorization.

609658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237 (or 6230 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 609658 is about 780.8059938295. The cubic root of 609658 is about 84.7934083223.

The spelling of 609658 in words is "six hundred nine thousand, six hundred fifty-eight".