317288891 has 2 divisors, whose sum is σ = 317288892. Its totient is φ = 317288890.

The previous prime is 317288789. The next prime is 317288903. The reversal of 317288891 is 198882713.

It is a strong prime.

It is an emirp because it is prime and its reverse (198882713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317288891 - 2¹⁸ = 317026747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (317288591) 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 as a sum of consecutive naturals, namely, 158644445 + 158644446.

It is an arithmetic number, because the mean of its divisors is an integer number (158644446).

Almost surely, 2^317288891 is an apocalyptic number.

317288891 is a deficient number, since it is larger than the sum of its proper divisors (1).

317288891 is an equidigital number, since it uses as much as digits as its factorization.

317288891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 47.

The square root of 317288891 is about 17812.6048347792. The cubic root of 317288891 is about 682.0532597731.

The spelling of 317288891 in words is "three hundred seventeen million, two hundred eighty-eight thousand, eight hundred ninety-one".