1320377209 has 2 divisors, whose sum is σ = 1320377210. Its totient is φ = 1320377208.

The previous prime is 1320377183. The next prime is 1320377213. The reversal of 1320377209 is 9027730231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1302127225 + 18249984 = 36085^2 + 4272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320377209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320377309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660188604 + 660188605.

It is an arithmetic number, because the mean of its divisors is an integer number (660188605).

Almost surely, 2^1320377209 is an apocalyptic number.

It is an amenable number.

1320377209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320377209 is an equidigital number, since it uses as much as digits as its factorization.

1320377209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 1320377209 is about 36336.9950463711. The cubic root of 1320377209 is about 1097.0657913629.

The spelling of 1320377209 in words is "one billion, three hundred twenty million, three hundred seventy-seven thousand, two hundred nine".