1327236991 has 2 divisors, whose sum is σ = 1327236992. Its totient is φ = 1327236990.

The previous prime is 1327236983. The next prime is 1327237013. The reversal of 1327236991 is 1996327231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1327236991 - 2³ = 1327236983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1327236931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663618495 + 663618496.

It is an arithmetic number, because the mean of its divisors is an integer number (663618496).

Almost surely, 2^1327236991 is an apocalyptic number.

1327236991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327236991 is an equidigital number, since it uses as much as digits as its factorization.

1327236991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 1327236991 is about 36431.2639226256. The cubic root of 1327236991 is about 1098.9623799323.

The spelling of 1327236991 in words is "one billion, three hundred twenty-seven million, two hundred thirty-six thousand, nine hundred ninety-one".