191390 has 8 divisors (see below), whose sum is σ = 344520. Its totient is φ = 76552.

The previous prime is 191353. The next prime is 191413. The reversal of 191390 is 93191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

191390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9560 + ... + 9579.

It is an arithmetic number, because the mean of its divisors is an integer number (43065).

2¹⁹¹³⁹⁰ is an apocalyptic number.

191390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191390 is a deficient number, since it is larger than the sum of its proper divisors (153130).

191390 is a wasteful number, since it uses less digits than its factorization.

191390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19146.

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

The square root of 191390 is about 437.4814281772. The cubic root of 191390 is about 57.6288227019.

The spelling of 191390 in words is "one hundred ninety-one thousand, three hundred ninety".