1328529613 has 4 divisors (see below), whose sum is σ = 1338087520. Its totient is φ = 1318971708.

The previous prime is 1328529599. The next prime is 1328529691. The reversal of 1328529613 is 3169258231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3169258231 = 1097 ⋅2889023.

It is a cyclic number.

It is not a de Polignac number, because 1328529613 - 2⁵ = 1328529581 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 (1328529313) 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 3 ways as a sum of consecutive naturals, for example, 4778745 + ... + 4779022.

It is an arithmetic number, because the mean of its divisors is an integer number (334521880).

Almost surely, 2^1328529613 is an apocalyptic number.

It is an amenable number.

1328529613 is a deficient number, since it is larger than the sum of its proper divisors (9557907).

1328529613 is an equidigital number, since it uses as much as digits as its factorization.

1328529613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557906.

The product of its digits is 77760, while the sum is 40.

The square root of 1328529613 is about 36449.0001646136. Note that the first 3 decimals coincide. The cubic root of 1328529613 is about 1099.3190311417.

The spelling of 1328529613 in words is "one billion, three hundred twenty-eight million, five hundred twenty-nine thousand, six hundred thirteen".