609005 has 6 divisors (see below), whose sum is σ = 732906. Its totient is φ = 485808.

The previous prime is 608999. The next prime is 609043. The reversal of 609005 is 500906.

It can be written as a sum of positive squares in 3 ways, for example, as 174724 + 434281 = 418^2 + 659^2 .

It is not a de Polignac number, because 609005 - 2⁴ = 608989 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1571 + ... + 1919.

It is an arithmetic number, because the mean of its divisors is an integer number (122151).

2⁶⁰⁹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

609005 is a deficient number, since it is larger than the sum of its proper divisors (123901).

609005 is an frugal number, since it uses more digits than its factorization.

609005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 609005 is about 780.3877241474. The cubic root of 609005 is about 84.7631236511.

Multiplying 609005 by its sum of digits (20), we get a square (12180100 = 3490²).

The spelling of 609005 in words is "six hundred nine thousand, five".