1328299493 has 2 divisors, whose sum is σ = 1328299494. Its totient is φ = 1328299492.

The previous prime is 1328299487. The next prime is 1328299507. The reversal of 1328299493 is 3949928231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1301910724 + 26388769 = 36082^2 + 5137^2 .

It is an emirp because it is prime and its reverse (3949928231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328299493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328289493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664149746 + 664149747.

It is an arithmetic number, because the mean of its divisors is an integer number (664149747).

Almost surely, 2^1328299493 is an apocalyptic number.

It is an amenable number.

1328299493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328299493 is an equidigital number, since it uses as much as digits as its factorization.

1328299493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 1328299493 is about 36445.8432883642. The cubic root of 1328299493 is about 1099.2555549746.

The spelling of 1328299493 in words is "one billion, three hundred twenty-eight million, two hundred ninety-nine thousand, four hundred ninety-three".