8427382021 has 2 divisors, whose sum is σ = 8427382022. Its totient is φ = 8427382020.

The previous prime is 8427382003. The next prime is 8427382063. The reversal of 8427382021 is 1202837248.

8427382021 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., 6874233921 + 1553148100 = 82911^2 + 39410^2 .

It is a cyclic number.

It is not a de Polignac number, because 8427382021 - 2⁹ = 8427381509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8427382081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4213691010 + 4213691011.

It is an arithmetic number, because the mean of its divisors is an integer number (4213691011).

Almost surely, 2^8427382021 is an apocalyptic number.

It is an amenable number.

8427382021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8427382021 is an equidigital number, since it uses as much as digits as its factorization.

8427382021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8427382021 is about 91800.7735315994. The cubic root of 8427382021 is about 2034.9991263451. Note that the first 3 decimals are identical.

The spelling of 8427382021 in words is "eight billion, four hundred twenty-seven million, three hundred eighty-two thousand, twenty-one".