1329128597 has 2 divisors, whose sum is σ = 1329128598. Its totient is φ = 1329128596.

The previous prime is 1329128519. The next prime is 1329128617. The reversal of 1329128597 is 7958219231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1281711601 + 47416996 = 35801^2 + 6886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329128597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329128197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664564298 + 664564299.

It is an arithmetic number, because the mean of its divisors is an integer number (664564299).

Almost surely, 2^1329128597 is an apocalyptic number.

It is an amenable number.

1329128597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329128597 is an equidigital number, since it uses as much as digits as its factorization.

1329128597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 1329128597 is about 36457.2159798304. The cubic root of 1329128597 is about 1099.4842201769.

The spelling of 1329128597 in words is "one billion, three hundred twenty-nine million, one hundred twenty-eight thousand, five hundred ninety-seven".