285057943 has 2 divisors, whose sum is σ = 285057944. Its totient is φ = 285057942.

The previous prime is 285057923. The next prime is 285057973. The reversal of 285057943 is 349750582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285057943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285057943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285057923) 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, 142528971 + 142528972.

It is an arithmetic number, because the mean of its divisors is an integer number (142528972).

Almost surely, 2^285057943 is an apocalyptic number.

285057943 is a deficient number, since it is larger than the sum of its proper divisors (1).

285057943 is an equidigital number, since it uses as much as digits as its factorization.

285057943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 285057943 is about 16883.6590524685. The cubic root of 285057943 is about 658.1290316150.

The spelling of 285057943 in words is "two hundred eighty-five million, fifty-seven thousand, nine hundred forty-three".