1329944887 has 2 divisors, whose sum is σ = 1329944888. Its totient is φ = 1329944886.

The previous prime is 1329944849. The next prime is 1329944927. The reversal of 1329944887 is 7884499231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329944887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329947887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664972443 + 664972444.

It is an arithmetic number, because the mean of its divisors is an integer number (664972444).

Almost surely, 2^1329944887 is an apocalyptic number.

1329944887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329944887 is an equidigital number, since it uses as much as digits as its factorization.

1329944887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The square root of 1329944887 is about 36468.4094388554. The cubic root of 1329944887 is about 1099.7092584224.

The spelling of 1329944887 in words is "one billion, three hundred twenty-nine million, nine hundred forty-four thousand, eight hundred eighty-seven".