3679821 has 6 divisors (see below), whose sum is σ = 5315310. Its totient is φ = 2453208.

The previous prime is 3679817. The next prime is 3679831. The reversal of 3679821 is 1289763.

It can be written as a sum of positive squares in only one way, i.e., 2842596 + 837225 = 1686^2 + 915^2 .

It is not a de Polignac number, because 3679821 - 2² = 3679817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3679831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204426 + ... + 204443.

It is an arithmetic number, because the mean of its divisors is an integer number (885885).

Almost surely, 2^3679821 is an apocalyptic number.

It is an amenable number.

3679821 is a deficient number, since it is larger than the sum of its proper divisors (1635489).

3679821 is a wasteful number, since it uses less digits than its factorization.

3679821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408875 (or 408872 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3679821 is about 1918.2859536576. The cubic root of 3679821 is about 154.3863493216.

The spelling of 3679821 in words is "three million, six hundred seventy-nine thousand, eight hundred twenty-one".