8378444017 has 2 divisors, whose sum is σ = 8378444018. Its totient is φ = 8378444016.

The previous prime is 8378443993. The next prime is 8378444023. The reversal of 8378444017 is 7104448738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6534943921 + 1843500096 = 80839^2 + 42936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8378444017 is a prime.

It is not a weakly prime, because it can be changed into another prime (8378444077) 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, 4189222008 + 4189222009.

It is an arithmetic number, because the mean of its divisors is an integer number (4189222009).

Almost surely, 2^8378444017 is an apocalyptic number.

It is an amenable number.

8378444017 is a deficient number, since it is larger than the sum of its proper divisors (1).

8378444017 is an equidigital number, since it uses as much as digits as its factorization.

8378444017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 602112, while the sum is 46.

The square root of 8378444017 is about 91533.8408294987. The cubic root of 8378444017 is about 2031.0523810433.

The spelling of 8378444017 in words is "eight billion, three hundred seventy-eight million, four hundred forty-four thousand, seventeen".