17985008389 has 2 divisors, whose sum is σ = 17985008390. Its totient is φ = 17985008388.

The previous prime is 17985008369. The next prime is 17985008443. The reversal of 17985008389 is 98380058971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17644605889 + 340402500 = 132833^2 + 18450^2 .

It is an emirp because it is prime and its reverse (98380058971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17985008389 - 2⁵ = 17985008357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17985008369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8992504194 + 8992504195.

It is an arithmetic number, because the mean of its divisors is an integer number (8992504195).

Almost surely, 2^17985008389 is an apocalyptic number.

It is an amenable number.

17985008389 is a deficient number, since it is larger than the sum of its proper divisors (1).

17985008389 is an equidigital number, since it uses as much as digits as its factorization.

17985008389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 17985008389 in words is "seventeen billion, nine hundred eighty-five million, eight thousand, three hundred eighty-nine".