191320 has 16 divisors (see below), whose sum is σ = 430560. Its totient is φ = 76512.

The previous prime is 191299. The next prime is 191339. The reversal of 191320 is 23191.

191320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 191294 and 191303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2352 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (26910).

2¹⁹¹³²⁰ is an apocalyptic number.

191320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191320 is an abundant number, since it is smaller than the sum of its proper divisors (239240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191320 is a wasteful number, since it uses less digits than its factorization.

191320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794 (or 4790 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 191320 is about 437.4014174646. The cubic root of 191320 is about 57.6217960208.

The spelling of 191320 in words is "one hundred ninety-one thousand, three hundred twenty".