191063 has 4 divisors (see below), whose sum is σ = 202320. Its totient is φ = 179808.

The previous prime is 191057. The next prime is 191071. The reversal of 191063 is 360191.

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

It is a cyclic number.

It is not a de Polignac number, because 191063 - 2⁴ = 191047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5603 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (50580).

2¹⁹¹⁰⁶³ is an apocalyptic number.

191063 is a deficient number, since it is larger than the sum of its proper divisors (11257).

191063 is a wasteful number, since it uses less digits than its factorization.

191063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11256.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 191063 is about 437.1075382557. The cubic root of 191063 is about 57.5959833555.

The spelling of 191063 in words is "one hundred ninety-one thousand, sixty-three".