609399 has 24 divisors (see below), whose sum is σ = 1067040. Its totient is φ = 327168.

The previous prime is 609397. The next prime is 609403. The reversal of 609399 is 993906.

It is not a de Polignac number, because 609399 - 2¹ = 609397 is a prime.

609399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787 + ... + 1355.

It is an arithmetic number, because the mean of its divisors is an integer number (44460).

2⁶⁰⁹³⁹⁹ is an apocalyptic number.

609399 is a deficient number, since it is larger than the sum of its proper divisors (457641).

609399 is a wasteful number, since it uses less digits than its factorization.

609399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 609399 is about 780.6401219512. The cubic root of 609399 is about 84.7813990737.

Adding to 609399 its product of nonzero digits (13122), we get a square (622521 = 789²).

The spelling of 609399 in words is "six hundred nine thousand, three hundred ninety-nine".