1328748401 has 2 divisors, whose sum is σ = 1328748402. Its totient is φ = 1328748400.

The previous prime is 1328748397. The next prime is 1328748427. The reversal of 1328748401 is 1048478231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690428176 + 638320225 = 26276^2 + 25265^2 .

It is an emirp because it is prime and its reverse (1048478231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1328748401 - 2² = 1328748397 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328748431) 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 as a sum of consecutive naturals, namely, 664374200 + 664374201.

It is an arithmetic number, because the mean of its divisors is an integer number (664374201).

Almost surely, 2^1328748401 is an apocalyptic number.

It is an amenable number.

1328748401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328748401 is an equidigital number, since it uses as much as digits as its factorization.

1328748401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 1328748401 is about 36452.0013305168. The cubic root of 1328748401 is about 1099.3793746995.

The spelling of 1328748401 in words is "one billion, three hundred twenty-eight million, seven hundred forty-eight thousand, four hundred one".