379821 has 8 divisors (see below), whose sum is σ = 545440. Its totient is φ = 233712.

The previous prime is 379817. The next prime is 379837. The reversal of 379821 is 128973.

It is a happy number.

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

It is not a de Polignac number, because 379821 - 2² = 379817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (379811) 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, 4831 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (68180).

2³⁷⁹⁸²¹ is an apocalyptic number.

It is an amenable number.

379821 is a deficient number, since it is larger than the sum of its proper divisors (165619).

379821 is a wasteful number, since it uses less digits than its factorization.

379821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755.

The product of its digits is 3024, while the sum is 30.

The square root of 379821 is about 616.2961950231. The cubic root of 379821 is about 72.4201896218.

The spelling of 379821 in words is "three hundred seventy-nine thousand, eight hundred twenty-one".