191343 has 4 divisors (see below), whose sum is σ = 255128. Its totient is φ = 127560.

The previous prime is 191341. The next prime is 191353. The reversal of 191343 is 343191.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 191343 - 2¹ = 191341 is a prime.

It is a super-2 number, since 2×191343² = 73224287298, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

191343 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191341) 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 3 ways as a sum of consecutive naturals, for example, 31888 + ... + 31893.

It is an arithmetic number, because the mean of its divisors is an integer number (63782).

2¹⁹¹³⁴³ is an apocalyptic number.

191343 is a deficient number, since it is larger than the sum of its proper divisors (63785).

191343 is an equidigital number, since it uses as much as digits as its factorization.

191343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63784.

The product of its digits is 324, while the sum is 21.

The square root of 191343 is about 437.4277083130. The cubic root of 191343 is about 57.6241049765.

The spelling of 191343 in words is "one hundred ninety-one thousand, three hundred forty-three".