1598998109 has 2 divisors, whose sum is σ = 1598998110. Its totient is φ = 1598998108.

The previous prime is 1598998097. The next prime is 1598998123. The reversal of 1598998109 is 9018998951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1207354009 + 391644100 = 34747^2 + 19790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1598998109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1598998309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799499054 + 799499055.

It is an arithmetic number, because the mean of its divisors is an integer number (799499055).

Almost surely, 2^1598998109 is an apocalyptic number.

It is an amenable number.

1598998109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1598998109 is an equidigital number, since it uses as much as digits as its factorization.

1598998109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 59.

The square root of 1598998109 is about 39987.4744013672. The cubic root of 1598998109 is about 1169.3629153897.

The spelling of 1598998109 in words is "one billion, five hundred ninety-eight million, nine hundred ninety-eight thousand, one hundred nine".