191140443 has 12 divisors (see below), whose sum is σ = 297329760. Its totient is φ = 117624816.

The previous prime is 191140441. The next prime is 191140447. The reversal of 191140443 is 344041191.

191140443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 191140443 - 2¹ = 191140441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191140441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 816723 + ... + 816956.

It is an arithmetic number, because the mean of its divisors is an integer number (24777480).

Almost surely, 2^191140443 is an apocalyptic number.

191140443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

191140443 is a deficient number, since it is larger than the sum of its proper divisors (106189317).

191140443 is a wasteful number, since it uses less digits than its factorization.

191140443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633698 (or 1633695 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 191140443 is about 13825.3550768145. The cubic root of 191140443 is about 576.0376404077.

The spelling of 191140443 in words is "one hundred ninety-one million, one hundred forty thousand, four hundred forty-three".