5686821 has 16 divisors (see below), whose sum is σ = 9628800. Its totient is φ = 3249504.

The previous prime is 5686817. The next prime is 5686829. The reversal of 5686821 is 1286865.

It is a happy number.

It is not a de Polignac number, because 5686821 - 2² = 5686817 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

5686821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5686829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14856 + ... + 15233.

It is an arithmetic number, because the mean of its divisors is an integer number (601800).

Almost surely, 2^5686821 is an apocalyptic number.

It is an amenable number.

5686821 is a deficient number, since it is larger than the sum of its proper divisors (3941979).

5686821 is a wasteful number, since it uses less digits than its factorization.

5686821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30105 (or 30099 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 5686821 is about 2384.7056422125. The cubic root of 5686821 is about 178.4938208439.

The spelling of 5686821 in words is "five million, six hundred eighty-six thousand, eight hundred twenty-one".