327748991 has 2 divisors, whose sum is σ = 327748992. Its totient is φ = 327748990.

The previous prime is 327748963. The next prime is 327748999. The reversal of 327748991 is 199847723.

It is a strong prime.

It is an emirp because it is prime and its reverse (199847723) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 327748991 - 2¹⁴ = 327732607 is a prime.

It is a super-2 number, since 2×327748991² = 214838802203036162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (327748999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163874495 + 163874496.

It is an arithmetic number, because the mean of its divisors is an integer number (163874496).

Almost surely, 2^327748991 is an apocalyptic number.

327748991 is a deficient number, since it is larger than the sum of its proper divisors (1).

327748991 is an equidigital number, since it uses as much as digits as its factorization.

327748991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 327748991 is about 18103.8391232357. The cubic root of 327748991 is about 689.4674817260.

The spelling of 327748991 in words is "three hundred twenty-seven million, seven hundred forty-eight thousand, nine hundred ninety-one".