1330320191 has 2 divisors, whose sum is σ = 1330320192. Its totient is φ = 1330320190.

The previous prime is 1330320181. The next prime is 1330320203. The reversal of 1330320191 is 1910230331.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330320191 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 (1330320181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665160095 + 665160096.

It is an arithmetic number, because the mean of its divisors is an integer number (665160096).

Almost surely, 2^1330320191 is an apocalyptic number.

1330320191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330320191 is an equidigital number, since it uses as much as digits as its factorization.

1330320191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1330320191 is about 36473.5546800692. The cubic root of 1330320191 is about 1099.8126929007.

The spelling of 1330320191 in words is "one billion, three hundred thirty million, three hundred twenty thousand, one hundred ninety-one".