8473847621 has 2 divisors, whose sum is σ = 8473847622. Its totient is φ = 8473847620.

The previous prime is 8473847617. The next prime is 8473847663. The reversal of 8473847621 is 1267483748.

8473847621 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., 7812792100 + 661055521 = 88390^2 + 25711^2 .

It is a cyclic number.

It is not a de Polignac number, because 8473847621 - 2² = 8473847617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8473847621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8473147621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4236923810 + 4236923811.

It is an arithmetic number, because the mean of its divisors is an integer number (4236923811).

Almost surely, 2^8473847621 is an apocalyptic number.

It is an amenable number.

8473847621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8473847621 is an equidigital number, since it uses as much as digits as its factorization.

8473847621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 50.

The square root of 8473847621 is about 92053.5041212446. The cubic root of 8473847621 is about 2038.7323616531.

The spelling of 8473847621 in words is "eight billion, four hundred seventy-three million, eight hundred forty-seven thousand, six hundred twenty-one".