609609 has 48 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 282240.

The previous prime is 609607. The next prime is 609613. The reversal of 609609 is 906906.

609609 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 609609 - 2¹ = 609607 is a prime.

609609 is a strobogrammatic number because it is the same when read upside-down.

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 47 ways as a sum of consecutive naturals, for example, 21007 + ... + 21035.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2⁶⁰⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

609609 is a deficient number, since it is larger than the sum of its proper divisors (539511).

609609 is a wasteful number, since it uses less digits than its factorization.

609609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 609609 is about 780.7746153660. The cubic root of 609609 is about 84.7911365632.

It can be divided in two parts, 60 and 9609, that added together give a palindrome (9669).

The spelling of 609609 in words is "six hundred nine thousand, six hundred nine".