191189113 has 2 divisors, whose sum is σ = 191189114. Its totient is φ = 191189112.

The previous prime is 191189093. The next prime is 191189171. The reversal of 191189113 is 311981191.

191189113 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., 177742224 + 13446889 = 13332^2 + 3667^2 .

It is a cyclic number.

It is not a de Polignac number, because 191189113 - 2⁹ = 191188601 is a prime.

It is not a weakly prime, because it can be changed into another prime (191789113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95594556 + 95594557.

It is an arithmetic number, because the mean of its divisors is an integer number (95594557).

Almost surely, 2^191189113 is an apocalyptic number.

It is an amenable number.

191189113 is a deficient number, since it is larger than the sum of its proper divisors (1).

191189113 is an equidigital number, since it uses as much as digits as its factorization.

191189113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 34.

The square root of 191189113 is about 13827.1151365713. The cubic root of 191189113 is about 576.0865283219.

The spelling of 191189113 in words is "one hundred ninety-one million, one hundred eighty-nine thousand, one hundred thirteen".