8421017533 has 2 divisors, whose sum is σ = 8421017534. Its totient is φ = 8421017532.

The previous prime is 8421017509. The next prime is 8421017573. The reversal of 8421017533 is 3357101248.

8421017533 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., 8383599844 + 37417689 = 91562^2 + 6117^2 .

It is a cyclic number.

It is not a de Polignac number, because 8421017533 - 2¹³ = 8421009341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8421017573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210508766 + 4210508767.

It is an arithmetic number, because the mean of its divisors is an integer number (4210508767).

Almost surely, 2^8421017533 is an apocalyptic number.

It is an amenable number.

8421017533 is a deficient number, since it is larger than the sum of its proper divisors (1).

8421017533 is an equidigital number, since it uses as much as digits as its factorization.

8421017533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 8421017533 is about 91766.1023090771. The cubic root of 8421017533 is about 2034.4867098238.

The spelling of 8421017533 in words is "eight billion, four hundred twenty-one million, seventeen thousand, five hundred thirty-three".