285842317 has 2 divisors, whose sum is σ = 285842318. Its totient is φ = 285842316.

The previous prime is 285842309. The next prime is 285842341. The reversal of 285842317 is 713248582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227074761 + 58767556 = 15069^2 + 7666^2 .

It is a cyclic number.

It is not a de Polignac number, because 285842317 - 2³ = 285842309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285842317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285842017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142921158 + 142921159.

It is an arithmetic number, because the mean of its divisors is an integer number (142921159).

Almost surely, 2^285842317 is an apocalyptic number.

It is an amenable number.

285842317 is a deficient number, since it is larger than the sum of its proper divisors (1).

285842317 is an equidigital number, since it uses as much as digits as its factorization.

285842317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 285842317 is about 16906.8718868985. The cubic root of 285842317 is about 658.7321213314.

The spelling of 285842317 in words is "two hundred eighty-five million, eight hundred forty-two thousand, three hundred seventeen".