327685981 has 12 divisors (see below), whose sum is σ = 390485340. Its totient is φ = 274021440.

The previous prime is 327685979. The next prime is 327685987. The reversal of 327685981 is 189586723.

It can be written as a sum of positive squares in 2 ways, for example, as 101183481 + 226502500 = 10059^2 + 15050^2 .

It is not a de Polignac number, because 327685981 - 2¹ = 327685979 is a prime.

It is a super-2 number, since 2×327685981² = 214756204287864722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (327685987) 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, 79546 + ... + 83563.

It is an arithmetic number, because the mean of its divisors is an integer number (32540445).

Almost surely, 2^327685981 is an apocalyptic number.

It is an amenable number.

327685981 is a deficient number, since it is larger than the sum of its proper divisors (62799359).

327685981 is a wasteful number, since it uses less digits than its factorization.

327685981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163164 (or 163157 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 327685981 is about 18102.0988009678. The cubic root of 327685981 is about 689.4232953400.

The spelling of 327685981 in words is "three hundred twenty-seven million, six hundred eighty-five thousand, nine hundred eighty-one".