609638389 has 12 divisors (see below), whose sum is σ = 659122380. Its totient is φ = 563451840.

The previous prime is 609638369. The next prime is 609638431. The reversal of 609638389 is 983836906.

It can be written as a sum of positive squares in 2 ways, for example, as 8898289 + 600740100 = 2983^2 + 24510^2 .

It is not a de Polignac number, because 609638389 - 2²¹ = 607541237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609638369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5794 + ... + 35395.

It is an arithmetic number, because the mean of its divisors is an integer number (54926865).

Almost surely, 2^609638389 is an apocalyptic number.

It is an amenable number.

609638389 is a deficient number, since it is larger than the sum of its proper divisors (49483991).

609638389 is a wasteful number, since it uses less digits than its factorization.

609638389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41268 (or 41249 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 609638389 is about 24690.8563844999. The cubic root of 609638389 is about 847.9249912331.

The spelling of 609638389 in words is "six hundred nine million, six hundred thirty-eight thousand, three hundred eighty-nine".