1328685943 has 6 divisors (see below), whose sum is σ = 1438754784. Its totient is φ = 1226479176.

The previous prime is 1328685937. The next prime is 1328685997. The reversal of 1328685943 is 3495868231.

It is not a de Polignac number, because 1328685943 - 2¹³ = 1328677751 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 (1328685443) 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 5 ways as a sum of consecutive naturals, for example, 3930855 + ... + 3931192.

It is an arithmetic number, because the mean of its divisors is an integer number (239792464).

Almost surely, 2^1328685943 is an apocalyptic number.

1328685943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1328685943 is a deficient number, since it is larger than the sum of its proper divisors (110068841).

1328685943 is an equidigital number, since it uses as much as digits as its factorization.

1328685943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7862073 (or 7862060 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 1328685943 is about 36451.1446047994. The cubic root of 1328685943 is about 1099.3621489370.

The spelling of 1328685943 in words is "one billion, three hundred twenty-eight million, six hundred eighty-five thousand, nine hundred forty-three".