8421670573 has 2 divisors, whose sum is σ = 8421670574. Its totient is φ = 8421670572.

The previous prime is 8421670519. The next prime is 8421670589. The reversal of 8421670573 is 3750761248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8416594564 + 5076009 = 91742^2 + 2253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8421670573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8421610573) 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, 4210835286 + 4210835287.

It is an arithmetic number, because the mean of its divisors is an integer number (4210835287).

Almost surely, 2^8421670573 is an apocalyptic number.

It is an amenable number.

8421670573 is a deficient number, since it is larger than the sum of its proper divisors (1).

8421670573 is an equidigital number, since it uses as much as digits as its factorization.

8421670573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 8421670573 is about 91769.6604167194. The cubic root of 8421670573 is about 2034.5392991478.

The spelling of 8421670573 in words is "eight billion, four hundred twenty-one million, six hundred seventy thousand, five hundred seventy-three".