2098609 has 2 divisors, whose sum is σ = 2098610. Its totient is φ = 2098608.

The previous prime is 2098573. The next prime is 2098639. The reversal of 2098609 is 9068902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1882384 + 216225 = 1372^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2098609 - 2⁹ = 2098097 is a prime.

It is not a weakly prime, because it can be changed into another prime (2098639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049304 + 1049305.

It is an arithmetic number, because the mean of its divisors is an integer number (1049305).

2^2098609 is an apocalyptic number.

It is an amenable number.

2098609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2098609 is an equidigital number, since it uses as much as digits as its factorization.

2098609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 2098609 is about 1448.6576545202. The cubic root of 2098609 is about 128.0296358788.

The spelling of 2098609 in words is "two million, ninety-eight thousand, six hundred nine".