2198648789 has 2 divisors, whose sum is σ = 2198648790. Its totient is φ = 2198648788.

The previous prime is 2198648779. The next prime is 2198648801. The reversal of 2198648789 is 9878468912.

2198648789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1813311889 + 385336900 = 42583^2 + 19630^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198648789 - 2⁴ = 2198648773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2198648759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099324394 + 1099324395.

It is an arithmetic number, because the mean of its divisors is an integer number (1099324395).

Almost surely, 2^2198648789 is an apocalyptic number.

It is an amenable number.

2198648789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198648789 is an equidigital number, since it uses as much as digits as its factorization.

2198648789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 62.

The square root of 2198648789 is about 46889.7514282172. The cubic root of 2198648789 is about 1300.3251236124.

The spelling of 2198648789 in words is "two billion, one hundred ninety-eight million, six hundred forty-eight thousand, seven hundred eighty-nine".