609668 has 6 divisors (see below), whose sum is σ = 1066926. Its totient is φ = 304832.

The previous prime is 609641. The next prime is 609673. The reversal of 609668 is 866906.

It can be written as a sum of positive squares in only one way, i.e., 386884 + 222784 = 622^2 + 472^2 .

It is an unprimeable number.

609668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76205 + ... + 76212.

It is an arithmetic number, because the mean of its divisors is an integer number (177821).

2⁶⁰⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

609668 is a deficient number, since it is larger than the sum of its proper divisors (457258).

609668 is a wasteful number, since it uses less digits than its factorization.

609668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152421 (or 152419 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 609668 is about 780.8123974426. The cubic root of 609668 is about 84.7938719317.

The spelling of 609668 in words is "six hundred nine thousand, six hundred sixty-eight".