5978821 has 2 divisors, whose sum is σ = 5978822. Its totient is φ = 5978820.

The previous prime is 5978813. The next prime is 5978831. The reversal of 5978821 is 1288795.

5978821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4950625 + 1028196 = 2225^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 5978821 - 2³ = 5978813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5978801) 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 as a sum of consecutive naturals, namely, 2989410 + 2989411.

It is an arithmetic number, because the mean of its divisors is an integer number (2989411).

Almost surely, 2^5978821 is an apocalyptic number.

It is an amenable number.

5978821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5978821 is an equidigital number, since it uses as much as digits as its factorization.

5978821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 5978821 is about 2445.1627757677. The cubic root of 5978821 is about 181.4980027961.

The spelling of 5978821 in words is "five million, nine hundred seventy-eight thousand, eight hundred twenty-one".