191315383 has 8 divisors (see below), whose sum is σ = 220652960. Its totient is φ = 162479520.

The previous prime is 191315359. The next prime is 191315387. The reversal of 191315383 is 383513191.

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

It is a de Polignac number, because none of the positive numbers 2^k-191315383 is a prime.

It is a super-3 number, since 3×191315383³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191315387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124608 + ... + 126133.

It is an arithmetic number, because the mean of its divisors is an integer number (27581620).

Almost surely, 2^191315383 is an apocalyptic number.

191315383 is a deficient number, since it is larger than the sum of its proper divisors (29337577).

191315383 is a wasteful number, since it uses less digits than its factorization.

191315383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250857.

The product of its digits is 9720, while the sum is 34.

The square root of 191315383 is about 13831.6804112877. The cubic root of 191315383 is about 576.2133250077.

The spelling of 191315383 in words is "one hundred ninety-one million, three hundred fifteen thousand, three hundred eighty-three".