191300318189 has 2 divisors, whose sum is σ = 191300318190. Its totient is φ = 191300318188.

The previous prime is 191300318177. The next prime is 191300318207. The reversal of 191300318189 is 981813003191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191117608900 + 182709289 = 437170^2 + 13517^2 .

It is a cyclic number.

It is not a de Polignac number, because 191300318189 - 2⁴ = 191300318173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191300318149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95650159094 + 95650159095.

It is an arithmetic number, because the mean of its divisors is an integer number (95650159095).

Almost surely, 2^191300318189 is an apocalyptic number.

It is an amenable number.

191300318189 is a deficient number, since it is larger than the sum of its proper divisors (1).

191300318189 is an equidigital number, since it uses as much as digits as its factorization.

191300318189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 191300318189 in words is "one hundred ninety-one billion, three hundred million, three hundred eighteen thousand, one hundred eighty-nine".