1328538269 has 2 divisors, whose sum is σ = 1328538270. Its totient is φ = 1328538268.

The previous prime is 1328538257. The next prime is 1328538271. The reversal of 1328538269 is 9628358231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185424900 + 143113369 = 34430^2 + 11963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328538269 is a prime.

It is a super-2 number, since 2×1328538269² = 3530027864395032722, which contains 22 as substring.

Together with 1328538271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328538209) 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, 664269134 + 664269135.

It is an arithmetic number, because the mean of its divisors is an integer number (664269135).

Almost surely, 2^1328538269 is an apocalyptic number.

It is an amenable number.

1328538269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328538269 is an equidigital number, since it uses as much as digits as its factorization.

1328538269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 1328538269 is about 36449.1189056745. The cubic root of 1328538269 is about 1099.3214186647.

The spelling of 1328538269 in words is "one billion, three hundred twenty-eight million, five hundred thirty-eight thousand, two hundred sixty-nine".