1327788409 has 2 divisors, whose sum is σ = 1327788410. Its totient is φ = 1327788408.

The previous prime is 1327788391. The next prime is 1327788421. The reversal of 1327788409 is 9048877231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1008380025 + 319408384 = 31755^2 + 17872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1327788409 - 2⁹ = 1327787897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1327788509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663894204 + 663894205.

It is an arithmetic number, because the mean of its divisors is an integer number (663894205).

Almost surely, 2^1327788409 is an apocalyptic number.

It is an amenable number.

1327788409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327788409 is an equidigital number, since it uses as much as digits as its factorization.

1327788409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 1327788409 is about 36438.8310597363. The cubic root of 1327788409 is about 1099.1145516342.

The spelling of 1327788409 in words is "one billion, three hundred twenty-seven million, seven hundred eighty-eight thousand, four hundred nine".