327912390721 has 4 divisors (see below), whose sum is σ = 328501102932. Its totient is φ = 327323678512.

The previous prime is 327912390691. The next prime is 327912390731. The reversal of 327912390721 is 127093219723.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127093219723 = 238291 ⋅533353.

It can be written as a sum of positive squares in 2 ways, for example, as 13823880625 + 314088510096 = 117575^2 + 560436^2 .

It is a cyclic number.

It is not a de Polignac number, because 327912390721 - 2⁷ = 327912390593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (327912390731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294355270 + ... + 294356383.

It is an arithmetic number, because the mean of its divisors is an integer number (82125275733).

Almost surely, 2^327912390721 is an apocalyptic number.

It is an amenable number.

327912390721 is a deficient number, since it is larger than the sum of its proper divisors (588712211).

327912390721 is an equidigital number, since it uses as much as digits as its factorization.

327912390721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588712210.

The product of its (nonzero) digits is 285768, while the sum is 46.

The spelling of 327912390721 in words is "three hundred twenty-seven billion, nine hundred twelve million, three hundred ninety thousand, seven hundred twenty-one".