1328208653 has 4 divisors (see below), whose sum is σ = 1360604028. Its totient is φ = 1295813280.

The previous prime is 1328208643. The next prime is 1328208659. The reversal of 1328208653 is 3568028231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38105929 + 1290102724 = 6173^2 + 35918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328208653 - 2⁸ = 1328208397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328208659) 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, 16197626 + ... + 16197707.

It is an arithmetic number, because the mean of its divisors is an integer number (340151007).

Almost surely, 2^1328208653 is an apocalyptic number.

It is an amenable number.

1328208653 is a deficient number, since it is larger than the sum of its proper divisors (32395375).

1328208653 is an equidigital number, since it uses as much as digits as its factorization.

1328208653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32395374.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1328208653 is about 36444.5970344028. The cubic root of 1328208653 is about 1099.2304957036.

The spelling of 1328208653 in words is "one billion, three hundred twenty-eight million, two hundred eight thousand, six hundred fifty-three".