317628191 has 2 divisors, whose sum is σ = 317628192. Its totient is φ = 317628190.

The previous prime is 317628169. The next prime is 317628203. The reversal of 317628191 is 191826713.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317628191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317628121) 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 as a sum of consecutive naturals, namely, 158814095 + 158814096.

It is an arithmetic number, because the mean of its divisors is an integer number (158814096).

Almost surely, 2^317628191 is an apocalyptic number.

317628191 is a deficient number, since it is larger than the sum of its proper divisors (1).

317628191 is an equidigital number, since it uses as much as digits as its factorization.

317628191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 317628191 is about 17822.1264443949. The cubic root of 317628191 is about 682.2962961510.

The spelling of 317628191 in words is "three hundred seventeen million, six hundred twenty-eight thousand, one hundred ninety-one".