606609 has 10 divisors (see below), whose sum is σ = 906290. Its totient is φ = 404352.

The previous prime is 606607. The next prime is 606643. The reversal of 606609 is 906606.

It can be written as a sum of positive squares in only one way, i.e., 518400 + 88209 = 720^2 + 297^2 .

It is not a de Polignac number, because 606609 - 2¹ = 606607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 6⁶ + 0 + 6⁷ + 6⁷ + 0 + 9² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (606607) by changing a digit.

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

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3664 + ... + 3825.

It is an arithmetic number, because the mean of its divisors is an integer number (90629).

2⁶⁰⁶⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

606609 is a deficient number, since it is larger than the sum of its proper divisors (299681).

606609 is an equidigital number, since it uses as much as digits as its factorization.

606609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7501 (or 7492 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 606609 is about 778.8510769075. The cubic root of 606609 is about 84.6518167548.

The spelling of 606609 in words is "six hundred six thousand, six hundred nine".