1329768689 has 2 divisors, whose sum is σ = 1329768690. Its totient is φ = 1329768688.

The previous prime is 1329768683. The next prime is 1329768709. The reversal of 1329768689 is 9868679231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 758176225 + 571592464 = 27535^2 + 23908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329768689 - 2⁴ = 1329768673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1329768683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664884344 + 664884345.

It is an arithmetic number, because the mean of its divisors is an integer number (664884345).

Almost surely, 2^1329768689 is an apocalyptic number.

It is an amenable number.

1329768689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329768689 is an equidigital number, since it uses as much as digits as its factorization.

1329768689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 59.

The square root of 1329768689 is about 36465.9935967745. The cubic root of 1329768689 is about 1099.6606912145.

The spelling of 1329768689 in words is "one billion, three hundred twenty-nine million, seven hundred sixty-eight thousand, six hundred eighty-nine".