2198657089 has 2 divisors, whose sum is σ = 2198657090. Its totient is φ = 2198657088.

The previous prime is 2198657053. The next prime is 2198657117. The reversal of 2198657089 is 9807568912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2146932225 + 51724864 = 46335^2 + 7192^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198657089 - 2²⁹ = 1661786177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2198657189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099328544 + 1099328545.

It is an arithmetic number, because the mean of its divisors is an integer number (1099328545).

Almost surely, 2^2198657089 is an apocalyptic number.

It is an amenable number.

2198657089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198657089 is an equidigital number, since it uses as much as digits as its factorization.

2198657089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 2198657089 is about 46889.8399336146. The cubic root of 2198657089 is about 1300.3267598726.

The spelling of 2198657089 in words is "two billion, one hundred ninety-eight million, six hundred fifty-seven thousand, eighty-nine".