1328909089 has 2 divisors, whose sum is σ = 1328909090. Its totient is φ = 1328909088.

The previous prime is 1328909069. The next prime is 1328909117. The reversal of 1328909089 is 9809098231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322558689 + 6350400 = 36367^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328909089 - 2⁹ = 1328908577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328909069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664454544 + 664454545.

It is an arithmetic number, because the mean of its divisors is an integer number (664454545).

Almost surely, 2^1328909089 is an apocalyptic number.

It is an amenable number.

1328909089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328909089 is an equidigital number, since it uses as much as digits as its factorization.

1328909089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 1328909089 is about 36454.2053678310. The cubic root of 1328909089 is about 1099.4236895731.

The spelling of 1328909089 in words is "one billion, three hundred twenty-eight million, nine hundred nine thousand, eighty-nine".