191443 has 6 divisors (see below), whose sum is σ = 222756. Its totient is φ = 164052.

The previous prime is 191441. The next prime is 191447. The reversal of 191443 is 344191.

It is not a de Polignac number, because 191443 - 2¹ = 191441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1905 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (37126).

2¹⁹¹⁴⁴³ is an apocalyptic number.

191443 is a deficient number, since it is larger than the sum of its proper divisors (31313).

191443 is an equidigital number, since it uses as much as digits as its factorization.

191443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3914 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 191443 is about 437.5419979842. The cubic root of 191443 is about 57.6341417637.

The spelling of 191443 in words is "one hundred ninety-one thousand, four hundred forty-three".