2018189897 has 2 divisors, whose sum is σ = 2018189898. Its totient is φ = 2018189896.

The previous prime is 2018189791. The next prime is 2018189933. The reversal of 2018189897 is 7989818102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1781768521 + 236421376 = 42211^2 + 15376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018189897 - 2¹⁸ = 2017927753 is a prime.

It is not a weakly prime, because it can be changed into another prime (2018183897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009094948 + 1009094949.

It is an arithmetic number, because the mean of its divisors is an integer number (1009094949).

Almost surely, 2^2018189897 is an apocalyptic number.

It is an amenable number.

2018189897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2018189897 is an equidigital number, since it uses as much as digits as its factorization.

2018189897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 53.

The square root of 2018189897 is about 44924.2684637157. The cubic root of 2018189897 is about 1263.7291672665.

The spelling of 2018189897 in words is "two billion, eighteen million, one hundred eighty-nine thousand, eight hundred ninety-seven".