1328001539 has 2 divisors, whose sum is σ = 1328001540. Its totient is φ = 1328001538.

The previous prime is 1328001533. The next prime is 1328001547. The reversal of 1328001539 is 9351008231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328001539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328001533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664000769 + 664000770.

It is an arithmetic number, because the mean of its divisors is an integer number (664000770).

Almost surely, 2^1328001539 is an apocalyptic number.

1328001539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328001539 is an equidigital number, since it uses as much as digits as its factorization.

1328001539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1328001539 is about 36441.7554324706. The cubic root of 1328001539 is about 1099.1733566240.

The spelling of 1328001539 in words is "one billion, three hundred twenty-eight million, one thousand, five hundred thirty-nine".