191330493 has 8 divisors (see below), whose sum is σ = 258915168. Its totient is φ = 125649744.

The previous prime is 191330473. The next prime is 191330507. The reversal of 191330493 is 394033191.

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

It is not a de Polignac number, because 191330493 - 2²² = 187136189 is a prime.

It is a super-3 number, since 3×191330493³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191330413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475746 + ... + 476147.

It is an arithmetic number, because the mean of its divisors is an integer number (32364396).

Almost surely, 2^191330493 is an apocalyptic number.

It is an amenable number.

191330493 is a deficient number, since it is larger than the sum of its proper divisors (67584675).

191330493 is an equidigital number, since it uses as much as digits as its factorization.

191330493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951963.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 191330493 is about 13832.2266103473. The cubic root of 191330493 is about 576.2284942952.

The spelling of 191330493 in words is "one hundred ninety-one million, three hundred thirty thousand, four hundred ninety-three".