218098728293 has 2 divisors, whose sum is σ = 218098728294. Its totient is φ = 218098728292.

The previous prime is 218098728283. The next prime is 218098728299. The reversal of 218098728293 is 392827890812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133500352129 + 84598376164 = 365377^2 + 290858^2 .

It is a cyclic number.

It is not a de Polignac number, because 218098728293 - 2¹⁰ = 218098727269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218098728299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109049364146 + 109049364147.

It is an arithmetic number, because the mean of its divisors is an integer number (109049364147).

Almost surely, 2^218098728293 is an apocalyptic number.

It is an amenable number.

218098728293 is a deficient number, since it is larger than the sum of its proper divisors (1).

218098728293 is an equidigital number, since it uses as much as digits as its factorization.

218098728293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 218098728293 in words is "two hundred eighteen billion, ninety-eight million, seven hundred twenty-eight thousand, two hundred ninety-three".