2018189791 has 2 divisors, whose sum is σ = 2018189792. Its totient is φ = 2018189790.

The previous prime is 2018189783. The next prime is 2018189897. The reversal of 2018189791 is 1979818102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2018189791 - 2³ = 2018189783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2018189711) 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, 1009094895 + 1009094896.

It is an arithmetic number, because the mean of its divisors is an integer number (1009094896).

Almost surely, 2^2018189791 is an apocalyptic number.

2018189791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2018189791 is an equidigital number, since it uses as much as digits as its factorization.

2018189791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 2018189791 is about 44924.2672839524. The cubic root of 2018189791 is about 1263.7291451419.

The spelling of 2018189791 in words is "two billion, eighteen million, one hundred eighty-nine thousand, seven hundred ninety-one".