1328139659 has 24 divisors (see below), whose sum is σ = 1691581248. Its totient is φ = 1031138640.

The previous prime is 1328139647. The next prime is 1328139713. The reversal of 1328139659 is 9569318231.

It is not a de Polignac number, because 1328139659 - 2⁸ = 1328139403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1328139259) 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 23 ways as a sum of consecutive naturals, for example, 148184 + ... + 156890.

It is an arithmetic number, because the mean of its divisors is an integer number (70482552).

Almost surely, 2^1328139659 is an apocalyptic number.

1328139659 is a deficient number, since it is larger than the sum of its proper divisors (363441589).

1328139659 is a wasteful number, since it uses less digits than its factorization.

1328139659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9015 (or 9008 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 1328139659 is about 36443.6504620489. The cubic root of 1328139659 is about 1099.2114621424.

The spelling of 1328139659 in words is "one billion, three hundred twenty-eight million, one hundred thirty-nine thousand, six hundred fifty-nine".