327821 has 8 divisors (see below), whose sum is σ = 357504. Its totient is φ = 298800.

The previous prime is 327809. The next prime is 327823. The reversal of 327821 is 128723.

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

It is a cyclic number.

It is not a de Polignac number, because 327821 - 2⁶ = 327757 is a prime.

It is a d-powerful number, because it can be written as 3³ + 2¹⁶ + 8² + 7² + 2¹⁸ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 327821.

It is not an unprimeable number, because it can be changed into a prime (327823) 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, 1880 + ... + 2046.

It is an arithmetic number, because the mean of its divisors is an integer number (44688).

2³²⁷⁸²¹ is an apocalyptic number.

It is an amenable number.

327821 is a deficient number, since it is larger than the sum of its proper divisors (29683).

327821 is a wasteful number, since it uses less digits than its factorization.

327821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its digits is 672, while the sum is 23.

The square root of 327821 is about 572.5565474257. The cubic root of 327821 is about 68.9517971816.

The spelling of 327821 in words is "three hundred twenty-seven thousand, eight hundred twenty-one".