1998327443929 has 2 divisors, whose sum is σ = 1998327443930. Its totient is φ = 1998327443928.

The previous prime is 1998327443891. The next prime is 1998327444007. The reversal of 1998327443929 is 9293447238991.

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., 1972058490000 + 26268953929 = 1404300^2 + 162077^2 .

It is a cyclic number.

It is not a de Polignac number, because 1998327443929 - 2¹¹ = 1998327441881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1998327443029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999163721964 + 999163721965.

It is an arithmetic number, because the mean of its divisors is an integer number (999163721965).

Almost surely, 2^{1998327443929} is an apocalyptic number.

It is an amenable number.

1998327443929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998327443929 is an equidigital number, since it uses as much as digits as its factorization.

1998327443929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211631616, while the sum is 70.

The spelling of 1998327443929 in words is "one trillion, nine hundred ninety-eight billion, three hundred twenty-seven million, four hundred forty-three thousand, nine hundred twenty-nine".