2118889 has 2 divisors, whose sum is σ = 2118890. Its totient is φ = 2118888.

The previous prime is 2118877. The next prime is 2118917. The reversal of 2118889 is 9888112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1734489 + 384400 = 1317^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118889 - 2⁹ = 2118377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2118089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059444 + 1059445.

It is an arithmetic number, because the mean of its divisors is an integer number (1059445).

2^2118889 is an apocalyptic number.

It is an amenable number.

2118889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118889 is an equidigital number, since it uses as much as digits as its factorization.

2118889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 37.

The square root of 2118889 is about 1455.6404088923. The cubic root of 2118889 is about 128.4407211933.

The spelling of 2118889 in words is "two million, one hundred eighteen thousand, eight hundred eighty-nine".