191317933 has 8 divisors (see below), whose sum is σ = 200236608. Its totient is φ = 182449344.

The previous prime is 191317877. The next prime is 191317993. The reversal of 191317933 is 339713191.

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

It is a cyclic number.

It is not a de Polignac number, because 191317933 - 2⁹ = 191317421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191317892 and 191317901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191317993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4591 + ... + 20092.

It is an arithmetic number, because the mean of its divisors is an integer number (25029576).

Almost surely, 2^191317933 is an apocalyptic number.

It is an amenable number.

191317933 is a deficient number, since it is larger than the sum of its proper divisors (8918675).

191317933 is a wasteful number, since it uses less digits than its factorization.

191317933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25043.

The product of its digits is 15309, while the sum is 37.

The square root of 191317933 is about 13831.7725906696. The cubic root of 191317933 is about 576.2158850692.

The spelling of 191317933 in words is "one hundred ninety-one million, three hundred seventeen thousand, nine hundred thirty-three".