609605 has 4 divisors (see below), whose sum is σ = 731532. Its totient is φ = 487680.

The previous prime is 609601. The next prime is 609607. The reversal of 609605 is 506906.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 332929 + 276676 = 577^2 + 526^2 .

It is not a de Polignac number, because 609605 - 2² = 609601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60956 + ... + 60965.

It is an arithmetic number, because the mean of its divisors is an integer number (182883).

2⁶⁰⁹⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

609605 is a deficient number, since it is larger than the sum of its proper divisors (121927).

609605 is a wasteful number, since it uses less digits than its factorization.

609605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121926.

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

The square root of 609605 is about 780.7720538032. The cubic root of 609605 is about 84.7909511081.

The spelling of 609605 in words is "six hundred nine thousand, six hundred five".