659609 has 2 divisors, whose sum is σ = 659610. Its totient is φ = 659608.

The previous prime is 659597. The next prime is 659611. The reversal of 659609 is 906956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394384 + 265225 = 628^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 659609 - 2⁸ = 659353 is a prime.

Together with 659611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (659629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329804 + 329805.

It is an arithmetic number, because the mean of its divisors is an integer number (329805).

2⁶⁵⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

659609 is a deficient number, since it is larger than the sum of its proper divisors (1).

659609 is an equidigital number, since it uses as much as digits as its factorization.

659609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 659609 is about 812.1631609474. The cubic root of 659609 is about 87.0486802033.

The spelling of 659609 in words is "six hundred fifty-nine thousand, six hundred nine".