191943 has 8 divisors (see below), whose sum is σ = 284400. Its totient is φ = 127944.

The previous prime is 191929. The next prime is 191953. The reversal of 191943 is 349191.

191943 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 191943 - 2⁵ = 191911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7109 = 191943 / (1 + 9 + 1 + 9 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528 + ... + 3581.

It is an arithmetic number, because the mean of its divisors is an integer number (35550).

2¹⁹¹⁹⁴³ is an apocalyptic number.

191943 is a deficient number, since it is larger than the sum of its proper divisors (92457).

191943 is an equidigital number, since it uses as much as digits as its factorization.

191943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118 (or 7112 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 191943 is about 438.1129991224. The cubic root of 191943 is about 57.6842733427.

The spelling of 191943 in words is "one hundred ninety-one thousand, nine hundred forty-three".