327909981 has 8 divisors (see below), whose sum is σ = 499672384. Its totient is φ = 187377120.

The previous prime is 327909977. The next prime is 327909983. The reversal of 327909981 is 189909723.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 327909981 - 2² = 327909977 is a prime.

It is a super-2 number, since 2×327909981² = 215049911278840722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 327909981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (327909983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7807360 + ... + 7807401.

It is an arithmetic number, because the mean of its divisors is an integer number (62459048).

Almost surely, 2^327909981 is an apocalyptic number.

It is an amenable number.

327909981 is a deficient number, since it is larger than the sum of its proper divisors (171762403).

327909981 is a wasteful number, since it uses less digits than its factorization.

327909981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15614771.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 327909981 is about 18108.2848718480. The cubic root of 327909981 is about 689.5803518431.

The spelling of 327909981 in words is "three hundred twenty-seven million, nine hundred nine thousand, nine hundred eighty-one".