327685681 has 4 divisors (see below), whose sum is σ = 330748272. Its totient is φ = 324623092.

The previous prime is 327685679. The next prime is 327685711. The reversal of 327685681 is 186586723.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186586723 = 2791 ⋅66853.

It is a cyclic number.

It is not a de Polignac number, because 327685681 - 2¹ = 327685679 is a prime.

It is a super-2 number, since 2×327685681² = 214755811064867522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (327685481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531135 + ... + 1531348.

It is an arithmetic number, because the mean of its divisors is an integer number (82687068).

Almost surely, 2^327685681 is an apocalyptic number.

It is an amenable number.

327685681 is a deficient number, since it is larger than the sum of its proper divisors (3062591).

327685681 is a wasteful number, since it uses less digits than its factorization.

327685681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062590.

The product of its digits is 483840, while the sum is 46.

The square root of 327685681 is about 18102.0905146339. The cubic root of 327685681 is about 689.4230849485.

The spelling of 327685681 in words is "three hundred twenty-seven million, six hundred eighty-five thousand, six hundred eighty-one".