8317846021 has 2 divisors, whose sum is σ = 8317846022. Its totient is φ = 8317846020.

The previous prime is 8317846001. The next prime is 8317846039. The reversal of 8317846021 is 1206487138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5199852100 + 3117993921 = 72110^2 + 55839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8317846021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8317846001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4158923010 + 4158923011.

It is an arithmetic number, because the mean of its divisors is an integer number (4158923011).

Almost surely, 2^8317846021 is an apocalyptic number.

It is an amenable number.

8317846021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8317846021 is an equidigital number, since it uses as much as digits as its factorization.

8317846021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 8317846021 is about 91202.2259651594. The cubic root of 8317846021 is about 2026.1439268363.

The spelling of 8317846021 in words is "eight billion, three hundred seventeen million, eight hundred forty-six thousand, twenty-one".