1798161089 has 2 divisors, whose sum is σ = 1798161090. Its totient is φ = 1798161088.

The previous prime is 1798161061. The next prime is 1798161133. The reversal of 1798161089 is 9801618971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1778730625 + 19430464 = 42175^2 + 4408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798161089 - 2¹² = 1798156993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1798161019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899080544 + 899080545.

It is an arithmetic number, because the mean of its divisors is an integer number (899080545).

Almost surely, 2^1798161089 is an apocalyptic number.

It is an amenable number.

1798161089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798161089 is an equidigital number, since it uses as much as digits as its factorization.

1798161089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 50.

The square root of 1798161089 is about 42404.7295593310. The cubic root of 1798161089 is about 1216.0260124806.

The spelling of 1798161089 in words is "one billion, seven hundred ninety-eight million, one hundred sixty-one thousand, eighty-nine".