285341789 has 2 divisors, whose sum is σ = 285341790. Its totient is φ = 285341788.

The previous prime is 285341779. The next prime is 285341809. The reversal of 285341789 is 987143582.

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., 248314564 + 37027225 = 15758^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 285341789 - 2⁸ = 285341533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285341729) 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, 142670894 + 142670895.

It is an arithmetic number, because the mean of its divisors is an integer number (142670895).

Almost surely, 2^285341789 is an apocalyptic number.

It is an amenable number.

285341789 is a deficient number, since it is larger than the sum of its proper divisors (1).

285341789 is an equidigital number, since it uses as much as digits as its factorization.

285341789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 285341789 is about 16892.0628994803. The cubic root of 285341789 is about 658.3474028007.

The spelling of 285341789 in words is "two hundred eighty-five million, three hundred forty-one thousand, seven hundred eighty-nine".