317285887 has 2 divisors, whose sum is σ = 317285888. Its totient is φ = 317285886.

The previous prime is 317285879. The next prime is 317285911. The reversal of 317285887 is 788582713.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 317285887 - 2³ = 317285879 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317285887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317285867) 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, 158642943 + 158642944.

It is an arithmetic number, because the mean of its divisors is an integer number (158642944).

Almost surely, 2^317285887 is an apocalyptic number.

317285887 is a deficient number, since it is larger than the sum of its proper divisors (1).

317285887 is an equidigital number, since it uses as much as digits as its factorization.

317285887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 49.

The square root of 317285887 is about 17812.5205122689. The cubic root of 317285887 is about 682.0511072716.

The spelling of 317285887 in words is "three hundred seventeen million, two hundred eighty-five thousand, eight hundred eighty-seven".