1328017399 has 4 divisors (see below), whose sum is σ = 1328298136. Its totient is φ = 1327736664.

The previous prime is 1328017393. The next prime is 1328017423. The reversal of 1328017399 is 9937108231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1328017399 - 2³ = 1328017391 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 (1328017391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133149 + ... + 142774.

It is an arithmetic number, because the mean of its divisors is an integer number (332074534).

Almost surely, 2^1328017399 is an apocalyptic number.

1328017399 is a deficient number, since it is larger than the sum of its proper divisors (280737).

1328017399 is an equidigital number, since it uses as much as digits as its factorization.

1328017399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280736.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1328017399 is about 36441.9730393402. The cubic root of 1328017399 is about 1099.1777323268.

The spelling of 1328017399 in words is "one billion, three hundred twenty-eight million, seventeen thousand, three hundred ninety-nine".