1327639739 has 2 divisors, whose sum is σ = 1327639740. Its totient is φ = 1327639738.

The previous prime is 1327639717. The next prime is 1327639751. The reversal of 1327639739 is 9379367231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1327639739 - 2⁸ = 1327639483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1327632739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663819869 + 663819870.

It is an arithmetic number, because the mean of its divisors is an integer number (663819870).

Almost surely, 2^1327639739 is an apocalyptic number.

1327639739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327639739 is an equidigital number, since it uses as much as digits as its factorization.

1327639739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 50.

The square root of 1327639739 is about 36436.7910085397. The cubic root of 1327639739 is about 1099.0735281653.

The spelling of 1327639739 in words is "one billion, three hundred twenty-seven million, six hundred thirty-nine thousand, seven hundred thirty-nine".