1328241757 has 2 divisors, whose sum is σ = 1328241758. Its totient is φ = 1328241756.

The previous prime is 1328241737. The next prime is 1328241763. The reversal of 1328241757 is 7571428231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1171966756 + 156275001 = 34234^2 + 12501^2 .

It is an emirp because it is prime and its reverse (7571428231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1328241757 - 2¹¹ = 1328239709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328241737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664120878 + 664120879.

It is an arithmetic number, because the mean of its divisors is an integer number (664120879).

Almost surely, 2^1328241757 is an apocalyptic number.

It is an amenable number.

1328241757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328241757 is an equidigital number, since it uses as much as digits as its factorization.

1328241757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 40.

The square root of 1328241757 is about 36445.0512004031. The cubic root of 1328241757 is about 1099.2396279595.

Adding to 1328241757 its reverse (7571428231), we get a palindrome (8899669988).

The spelling of 1328241757 in words is "one billion, three hundred twenty-eight million, two hundred forty-one thousand, seven hundred fifty-seven".