1326527989 has 2 divisors, whose sum is σ = 1326527990. Its totient is φ = 1326527988.

The previous prime is 1326527987. The next prime is 1326528019. The reversal of 1326527989 is 9897256231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793379889 + 533148100 = 28167^2 + 23090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326527989 - 2¹ = 1326527987 is a prime.

Together with 1326527987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326527987) 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, 663263994 + 663263995.

It is an arithmetic number, because the mean of its divisors is an integer number (663263995).

Almost surely, 2^1326527989 is an apocalyptic number.

It is an amenable number.

1326527989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326527989 is an equidigital number, since it uses as much as digits as its factorization.

1326527989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The square root of 1326527989 is about 36421.5319419708. The cubic root of 1326527989 is about 1098.7666587175.

The spelling of 1326527989 in words is "one billion, three hundred twenty-six million, five hundred twenty-seven thousand, nine hundred eighty-nine".