1327826491 has 2 divisors, whose sum is σ = 1327826492. Its totient is φ = 1327826490.

The previous prime is 1327826477. The next prime is 1327826557. The reversal of 1327826491 is 1946287231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1327826491 - 2¹³ = 1327818299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1327826411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663913245 + 663913246.

It is an arithmetic number, because the mean of its divisors is an integer number (663913246).

Almost surely, 2^1327826491 is an apocalyptic number.

1327826491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327826491 is an equidigital number, since it uses as much as digits as its factorization.

1327826491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 1327826491 is about 36439.3536029387. The cubic root of 1327826491 is about 1099.1250593526.

The spelling of 1327826491 in words is "one billion, three hundred twenty-seven million, eight hundred twenty-six thousand, four hundred ninety-one".