327709681 has 12 divisors (see below), whose sum is σ = 368937268. Its totient is φ = 289342944.

The previous prime is 327709667. The next prime is 327709721. The reversal of 327709681 is 186907723.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74390625 + 253319056 = 8625^2 + 15916^2 .

It is not a de Polignac number, because 327709681 - 2¹⁷ = 327578609 is a prime.

It is a super-2 number, since 2×327709681² = 214787270042243522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (327709601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16950 + ... + 30703.

Almost surely, 2^327709681 is an apocalyptic number.

It is an amenable number.

327709681 is a deficient number, since it is larger than the sum of its proper divisors (41227587).

327709681 is a wasteful number, since it uses less digits than its factorization.

327709681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47712 (or 47689 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 327709681 is about 18102.7534093574. The cubic root of 327709681 is about 689.4399158640.

The spelling of 327709681 in words is "three hundred twenty-seven million, seven hundred nine thousand, six hundred eighty-one".