285242917 has 2 divisors, whose sum is σ = 285242918. Its totient is φ = 285242916.

The previous prime is 285242861. The next prime is 285242933. The reversal of 285242917 is 719242582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219454596 + 65788321 = 14814^2 + 8111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285242917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285242917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285242957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142621458 + 142621459.

It is an arithmetic number, because the mean of its divisors is an integer number (142621459).

Almost surely, 2^285242917 is an apocalyptic number.

It is an amenable number.

285242917 is a deficient number, since it is larger than the sum of its proper divisors (1).

285242917 is an equidigital number, since it uses as much as digits as its factorization.

285242917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 285242917 is about 16889.1360643462. The cubic root of 285242917 is about 658.2713540683.

The spelling of 285242917 in words is "two hundred eighty-five million, two hundred forty-two thousand, nine hundred seventeen".