1328378587 has 2 divisors, whose sum is σ = 1328378588. Its totient is φ = 1328378586.

The previous prime is 1328378581. The next prime is 1328378609. The reversal of 1328378587 is 7858738231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1328378587 - 2⁷ = 1328378459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328378581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664189293 + 664189294.

It is an arithmetic number, because the mean of its divisors is an integer number (664189294).

Almost surely, 2^1328378587 is an apocalyptic number.

1328378587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328378587 is an equidigital number, since it uses as much as digits as its factorization.

1328378587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The square root of 1328378587 is about 36446.9283616603. The cubic root of 1328378587 is about 1099.2773730444.

The spelling of 1328378587 in words is "one billion, three hundred twenty-eight million, three hundred seventy-eight thousand, five hundred eighty-seven".