2188489 has 2 divisors, whose sum is σ = 2188490. Its totient is φ = 2188488.

The previous prime is 2188481. The next prime is 2188493. The reversal of 2188489 is 9848812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1904400 + 284089 = 1380^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188489 - 2³ = 2188481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2188481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094244 + 1094245.

It is an arithmetic number, because the mean of its divisors is an integer number (1094245).

2^2188489 is an apocalyptic number.

It is an amenable number.

2188489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188489 is an equidigital number, since it uses as much as digits as its factorization.

2188489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 40.

The square root of 2188489 is about 1479.3542510163. The cubic root of 2188489 is about 129.8319129384.

The spelling of 2188489 in words is "two million, one hundred eighty-eight thousand, four hundred eighty-nine".