17989336609 has 2 divisors, whose sum is σ = 17989336610. Its totient is φ = 17989336608.

The previous prime is 17989336537. The next prime is 17989336639. The reversal of 17989336609 is 90663398971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17325140625 + 664195984 = 131625^2 + 25772^2 .

It is a cyclic number.

It is not a de Polignac number, because 17989336609 - 2¹⁹ = 17988812321 is a prime.

It is not a weakly prime, because it can be changed into another prime (17989336639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8994668304 + 8994668305.

It is an arithmetic number, because the mean of its divisors is an integer number (8994668305).

Almost surely, 2^17989336609 is an apocalyptic number.

It is an amenable number.

17989336609 is a deficient number, since it is larger than the sum of its proper divisors (1).

17989336609 is an equidigital number, since it uses as much as digits as its factorization.

17989336609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 17989336609 in words is "seventeen billion, nine hundred eighty-nine million, three hundred thirty-six thousand, six hundred nine".