1798885189 has 2 divisors, whose sum is σ = 1798885190. Its totient is φ = 1798885188.

The previous prime is 1798885183. The next prime is 1798885217. The reversal of 1798885189 is 9815888971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1655676100 + 143209089 = 40690^2 + 11967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798885189 - 2⁹ = 1798884677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1798885189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1798885183) 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, 899442594 + 899442595.

It is an arithmetic number, because the mean of its divisors is an integer number (899442595).

Almost surely, 2^1798885189 is an apocalyptic number.

It is an amenable number.

1798885189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798885189 is an equidigital number, since it uses as much as digits as its factorization.

1798885189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 64.

The square root of 1798885189 is about 42413.2666626847. The cubic root of 1798885189 is about 1216.1892174116.

The spelling of 1798885189 in words is "one billion, seven hundred ninety-eight million, eight hundred eighty-five thousand, one hundred eighty-nine".