1330331909 has 2 divisors, whose sum is σ = 1330331910. Its totient is φ = 1330331908.

The previous prime is 1330331869. The next prime is 1330331917. The reversal of 1330331909 is 9091330331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1320232225 + 10099684 = 36335^2 + 3178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330331909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330331309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665165954 + 665165955.

It is an arithmetic number, because the mean of its divisors is an integer number (665165955).

Almost surely, 2^1330331909 is an apocalyptic number.

It is an amenable number.

1330331909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330331909 is an equidigital number, since it uses as much as digits as its factorization.

1330331909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 32.

The square root of 1330331909 is about 36473.7153166496. The cubic root of 1330331909 is about 1099.8159220900.

The spelling of 1330331909 in words is "one billion, three hundred thirty million, three hundred thirty-one thousand, nine hundred nine".