285397039 has 2 divisors, whose sum is σ = 285397040. Its totient is φ = 285397038.

The previous prime is 285397031. The next prime is 285397051. The reversal of 285397039 is 930793582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285397039 - 2³ = 285397031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285397039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285397031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142698519 + 142698520.

It is an arithmetic number, because the mean of its divisors is an integer number (142698520).

Almost surely, 2^285397039 is an apocalyptic number.

285397039 is a deficient number, since it is larger than the sum of its proper divisors (1).

285397039 is an equidigital number, since it uses as much as digits as its factorization.

285397039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 285397039 is about 16893.6982037682. The cubic root of 285397039 is about 658.3898914324.

The spelling of 285397039 in words is "two hundred eighty-five million, three hundred ninety-seven thousand, thirty-nine".