609684 has 36 divisors (see below), whose sum is σ = 1516704. Its totient is φ = 190256.

The previous prime is 609683. The next prime is 609701. The reversal of 609684 is 486906.

609684 = T₁₃₇ + T₁₃₈ + ... + T₁₈₃.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12949 + ... + 12995.

2⁶⁰⁹⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758352).

609684 is an abundant number, since it is smaller than the sum of its proper divisors (907020).

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

609684 is a wasteful number, since it uses less digits than its factorization.

609684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 609684 is about 780.8226431143. The cubic root of 609684 is about 84.7946136961.

The spelling of 609684 in words is "six hundred nine thousand, six hundred eighty-four".