8420745803 has 2 divisors, whose sum is σ = 8420745804. Its totient is φ = 8420745802.

The previous prime is 8420745797. The next prime is 8420745911. The reversal of 8420745803 is 3085470248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8420745803 - 2⁴ = 8420745787 is a prime.

It is a super-2 number, since 2×8420745803² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8420745703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210372901 + 4210372902.

It is an arithmetic number, because the mean of its divisors is an integer number (4210372902).

Almost surely, 2^8420745803 is an apocalyptic number.

8420745803 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420745803 is an equidigital number, since it uses as much as digits as its factorization.

8420745803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 41.

The square root of 8420745803 is about 91764.6217395353. The cubic root of 8420745803 is about 2034.4648266006.

The spelling of 8420745803 in words is "eight billion, four hundred twenty million, seven hundred forty-five thousand, eight hundred three".