2198689 has 2 divisors, whose sum is σ = 2198690. Its totient is φ = 2198688.

The previous prime is 2198671. The next prime is 2198701. The reversal of 2198689 is 9868912.

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., 1982464 + 216225 = 1408^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198689 - 2¹¹ = 2196641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2198659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099344 + 1099345.

It is an arithmetic number, because the mean of its divisors is an integer number (1099345).

2^2198689 is an apocalyptic number.

It is an amenable number.

2198689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198689 is an equidigital number, since it uses as much as digits as its factorization.

2198689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 2198689 is about 1482.7976935509. The cubic root of 2198689 is about 130.0333050762.

The spelling of 2198689 in words is "two million, one hundred ninety-eight thousand, six hundred eighty-nine".