191113389 has 12 divisors (see below), whose sum is σ = 281261916. Its totient is φ = 125004672.

The previous prime is 191113379. The next prime is 191113441. The reversal of 191113389 is 983311191.

It can be written as a sum of positive squares in 2 ways, for example, as 48191364 + 142922025 = 6942^2 + 11955^2 .

It is not a de Polignac number, because 191113389 - 2⁷ = 191113261 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191113379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199852 + ... + 200805.

It is an arithmetic number, because the mean of its divisors is an integer number (23438493).

Almost surely, 2^191113389 is an apocalyptic number.

It is an amenable number.

191113389 is a deficient number, since it is larger than the sum of its proper divisors (90148527).

191113389 is a wasteful number, since it uses less digits than its factorization.

191113389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400716 (or 400713 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 191113389 is about 13824.3766224738. The cubic root of 191113389 is about 576.0104616879.

It can be divided in two parts, 19111 and 3389, that added together give a square (22500 = 150²).

The spelling of 191113389 in words is "one hundred ninety-one million, one hundred thirteen thousand, three hundred eighty-nine".