2379821 has 4 divisors (see below), whose sum is σ = 2383392. Its totient is φ = 2376252.

The previous prime is 2379809. The next prime is 2379851. The reversal of 2379821 is 1289732.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2379821 - 2⁶ = 2379757 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 (2379851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455 + ... + 2228.

It is an arithmetic number, because the mean of its divisors is an integer number (595848).

2^2379821 is an apocalyptic number.

It is an amenable number.

2379821 is a deficient number, since it is larger than the sum of its proper divisors (3571).

2379821 is an equidigital number, since it uses as much as digits as its factorization.

2379821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570.

The product of its digits is 6048, while the sum is 32.

The square root of 2379821 is about 1542.6668467300. Note that the first 3 decimals coincide. The cubic root of 2379821 is about 133.5102976622.

The spelling of 2379821 in words is "two million, three hundred seventy-nine thousand, eight hundred twenty-one".