1329428591 has 2 divisors, whose sum is σ = 1329428592. Its totient is φ = 1329428590.

The previous prime is 1329428563. The next prime is 1329428609. The reversal of 1329428591 is 1958249231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329428591 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329428561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664714295 + 664714296.

It is an arithmetic number, because the mean of its divisors is an integer number (664714296).

Almost surely, 2^1329428591 is an apocalyptic number.

1329428591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329428591 is an equidigital number, since it uses as much as digits as its factorization.

1329428591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 1329428591 is about 36461.3300772202. The cubic root of 1329428591 is about 1099.5669344849.

The spelling of 1329428591 in words is "one billion, three hundred twenty-nine million, four hundred twenty-eight thousand, five hundred ninety-one".