285939943 has 2 divisors, whose sum is σ = 285939944. Its totient is φ = 285939942.

The previous prime is 285939937. The next prime is 285940009. The reversal of 285939943 is 349939582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285939943 - 2⁹ = 285939431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (286939943) 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, 142969971 + 142969972.

It is an arithmetic number, because the mean of its divisors is an integer number (142969972).

Almost surely, 2^285939943 is an apocalyptic number.

285939943 is a deficient number, since it is larger than the sum of its proper divisors (1).

285939943 is an equidigital number, since it uses as much as digits as its factorization.

285939943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 52.

The square root of 285939943 is about 16909.7588096342. The cubic root of 285939943 is about 658.8071068021.

The spelling of 285939943 in words is "two hundred eighty-five million, nine hundred thirty-nine thousand, nine hundred forty-three".