5676821 has 4 divisors (see below), whose sum is σ = 5684172. Its totient is φ = 5669472.

The previous prime is 5676787. The next prime is 5676823. The reversal of 5676821 is 1286765.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1286765 = 5 ⋅257353.

It can be written as a sum of positive squares in 2 ways, for example, as 2937796 + 2739025 = 1714^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 5676821 - 2⁶ = 5676757 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 (5676823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2360 + ... + 4113.

It is an arithmetic number, because the mean of its divisors is an integer number (1421043).

Almost surely, 2^5676821 is an apocalyptic number.

It is an amenable number.

5676821 is a deficient number, since it is larger than the sum of its proper divisors (7351).

5676821 is an equidigital number, since it uses as much as digits as its factorization.

5676821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7350.

The product of its digits is 20160, while the sum is 35.

The square root of 5676821 is about 2382.6080248333. The cubic root of 5676821 is about 178.3891352047.

The spelling of 5676821 in words is "five million, six hundred seventy-six thousand, eight hundred twenty-one".