8421285823 has 2 divisors, whose sum is σ = 8421285824. Its totient is φ = 8421285822.

The previous prime is 8421285797. The next prime is 8421285863. The reversal of 8421285823 is 3285821248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8421285823 - 2²¹ = 8419188671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8421285823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8421285863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210642911 + 4210642912.

It is an arithmetic number, because the mean of its divisors is an integer number (4210642912).

Almost surely, 2^8421285823 is an apocalyptic number.

8421285823 is a deficient number, since it is larger than the sum of its proper divisors (1).

8421285823 is an equidigital number, since it uses as much as digits as its factorization.

8421285823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 245760, while the sum is 43.

The square root of 8421285823 is about 91767.5641117274. The cubic root of 8421285823 is about 2034.5083155518.

The spelling of 8421285823 in words is "eight billion, four hundred twenty-one million, two hundred eighty-five thousand, eight hundred twenty-three".