609789 has 8 divisors (see below), whose sum is σ = 818272. Its totient is φ = 403920.

The previous prime is 609781. The next prime is 609803. The reversal of 609789 is 987906.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 609789 - 2³ = 609781 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19 + ... + 1104.

It is an arithmetic number, because the mean of its divisors is an integer number (102284).

2⁶⁰⁹⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

609789 is a deficient number, since it is larger than the sum of its proper divisors (208483).

609789 is a wasteful number, since it uses less digits than its factorization.

609789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 609789 is about 780.8898769993. The cubic root of 609789 is about 84.7994812031.

The spelling of 609789 in words is "six hundred nine thousand, seven hundred eighty-nine".