8720000017 has 2 divisors, whose sum is σ = 8720000018. Its totient is φ = 8720000016.

The previous prime is 8719999999. The next prime is 8720000101. The reversal of 8720000017 is 7100000278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8262082816 + 457917201 = 90896^2 + 21399^2 .

It is a cyclic number.

It is not a de Polignac number, because 8720000017 - 2³¹ = 6572516369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8719999946 and 8720000000.

It is not a weakly prime, because it can be changed into another prime (8720000617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360000008 + 4360000009.

It is an arithmetic number, because the mean of its divisors is an integer number (4360000009).

Almost surely, 2^8720000017 is an apocalyptic number.

It is an amenable number.

8720000017 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720000017 is an equidigital number, since it uses as much as digits as its factorization.

8720000017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 8720000017 is about 93380.9403304550. The cubic root of 8720000017 is about 2058.2849344806.

The spelling of 8720000017 in words is "eight billion, seven hundred twenty million, seventeen", and thus it is an aban number.