6609609 has 6 divisors (see below), whose sum is σ = 9547226. Its totient is φ = 4406400.

The previous prime is 6609607. The next prime is 6609649. The reversal of 6609609 is 9069066.

It can be written as a sum of positive squares in only one way, i.e., 6051600 + 558009 = 2460^2 + 747^2 .

It is not a de Polignac number, because 6609609 - 2¹ = 6609607 is a prime.

It is a super-2 number, since 2×6609609² = 87373862265762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6609601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367192 + ... + 367209.

Almost surely, 2^6609609 is an apocalyptic number.

It is an amenable number.

6609609 is a deficient number, since it is larger than the sum of its proper divisors (2937617).

6609609 is a wasteful number, since it uses less digits than its factorization.

6609609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734407 (or 734404 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 6609609 is about 2570.9159846249. The cubic root of 6609609 is about 187.6687334426.

It can be divided in two parts, 660960 and 9, that added together give a square (660969 = 813²).

The spelling of 6609609 in words is "six million, six hundred nine thousand, six hundred nine".