1320399193 has 2 divisors, whose sum is σ = 1320399194. Its totient is φ = 1320399192.

The previous prime is 1320399187. The next prime is 1320399221. The reversal of 1320399193 is 3919930231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018056649 + 302342544 = 31907^2 + 17388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320399193 - 2¹⁷ = 1320268121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320399103) 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, 660199596 + 660199597.

It is an arithmetic number, because the mean of its divisors is an integer number (660199597).

Almost surely, 2^1320399193 is an apocalyptic number.

It is an amenable number.

1320399193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320399193 is an equidigital number, since it uses as much as digits as its factorization.

1320399193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 1320399193 is about 36337.2975467356. The cubic root of 1320399193 is about 1097.0718799665.

The spelling of 1320399193 in words is "one billion, three hundred twenty million, three hundred ninety-nine thousand, one hundred ninety-three".