231302198478889 has 2 divisors, whose sum is σ = 231302198478890. Its totient is φ = 231302198478888.

The previous prime is 231302198478817. The next prime is 231302198478913. The reversal of 231302198478889 is 988874891203132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205582258659600 + 25719939819289 = 14338140^2 + 5071483^2 .

It is a cyclic number.

It is not a de Polignac number, because 231302198478889 - 2¹¹ = 231302198476841 is a prime.

It is not a weakly prime, because it can be changed into another prime (231302198479889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651099239444 + 115651099239445.

It is an arithmetic number, because the mean of its divisors is an integer number (115651099239445).

Almost surely, 2^{231302198478889} is an apocalyptic number.

It is an amenable number.

231302198478889 is a deficient number, since it is larger than the sum of its proper divisors (1).

231302198478889 is an equidigital number, since it uses as much as digits as its factorization.

231302198478889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 334430208, while the sum is 73.

The spelling of 231302198478889 in words is "two hundred thirty-one trillion, three hundred two billion, one hundred ninety-eight million, four hundred seventy-eight thousand, eight hundred eighty-nine".