193091 has 4 divisors (see below), whose sum is σ = 193992. Its totient is φ = 192192.

The previous prime is 193073. The next prime is 193093. The reversal of 193091 is 190391.

193091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193091 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 (193093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 626.

It is an arithmetic number, because the mean of its divisors is an integer number (48498).

2¹⁹³⁰⁹¹ is an apocalyptic number.

193091 is a deficient number, since it is larger than the sum of its proper divisors (901).

193091 is an equidigital number, since it uses as much as digits as its factorization.

193091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 193091 is about 439.4212102300. The cubic root of 193091 is about 57.7990469306.

The spelling of 193091 in words is "one hundred ninety-three thousand, ninety-one".