1018889 has 2 divisors, whose sum is σ = 1018890. Its totient is φ = 1018888.

The previous prime is 1018879. The next prime is 1018903. The reversal of 1018889 is 9888101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 366025 = 808^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018889 - 2⁴ = 1018873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1018859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509444 + 509445.

It is an arithmetic number, because the mean of its divisors is an integer number (509445).

2^1018889 is an apocalyptic number.

It is an amenable number.

1018889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018889 is an equidigital number, since it uses as much as digits as its factorization.

1018889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1018889 is about 1009.4003170200. The cubic root of 1018889 is about 100.6257100370.

The spelling of 1018889 in words is "one million, eighteen thousand, eight hundred eighty-nine".