17984429989 has 2 divisors, whose sum is σ = 17984429990. Its totient is φ = 17984429988.

The previous prime is 17984429971. The next prime is 17984430007. The reversal of 17984429989 is 98992448971.

It is a balanced prime because it is at equal distance from previous prime (17984429971) and next prime (17984430007).

It can be written as a sum of positive squares in only one way, i.e., 15974432100 + 2009997889 = 126390^2 + 44833^2 .

It is a cyclic number.

It is not a de Polignac number, because 17984429989 - 2²³ = 17976041381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17984429959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8992214994 + 8992214995.

It is an arithmetic number, because the mean of its divisors is an integer number (8992214995).

Almost surely, 2^17984429989 is an apocalyptic number.

It is an amenable number.

17984429989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17984429989 is an equidigital number, since it uses as much as digits as its factorization.

17984429989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94058496, while the sum is 70.

The spelling of 17984429989 in words is "seventeen billion, nine hundred eighty-four million, four hundred twenty-nine thousand, nine hundred eighty-nine".