609606 has 40 divisors (see below), whose sum is σ = 1411344. Its totient is φ = 196560.

The previous prime is 609601. The next prime is 609607. The reversal of 609606 is 606906.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 609606.

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 19 ways as a sum of consecutive naturals, for example, 8551 + ... + 8621.

2⁶⁰⁹⁶⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705672).

609606 is an abundant number, since it is smaller than the sum of its proper divisors (801738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

609606 is a wasteful number, since it uses less digits than its factorization.

609606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 129 counting only the distinct ones).

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

The square root of 609606 is about 780.7726941947. The cubic root of 609606 is about 84.7909974720.

609606 divided by its sum of digits (27) gives a triangular number (22578 = T₂₁₂).

The spelling of 609606 in words is "six hundred nine thousand, six hundred six".