1328321437 has 2 divisors, whose sum is σ = 1328321438. Its totient is φ = 1328321436.

The previous prime is 1328321429. The next prime is 1328321443. The reversal of 1328321437 is 7341238231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1234889881 + 93431556 = 35141^2 + 9666^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328321437 - 2³ = 1328321429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328321447) 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, 664160718 + 664160719.

It is an arithmetic number, because the mean of its divisors is an integer number (664160719).

Almost surely, 2^1328321437 is an apocalyptic number.

It is an amenable number.

1328321437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328321437 is an equidigital number, since it uses as much as digits as its factorization.

1328321437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 1328321437 is about 36446.1443365413. The cubic root of 1328321437 is about 1099.2616083110.

Adding to 1328321437 its reverse (7341238231), we get a palindrome (8669559668).

The spelling of 1328321437 in words is "one billion, three hundred twenty-eight million, three hundred twenty-one thousand, four hundred thirty-seven".