285385577 has 2 divisors, whose sum is σ = 285385578. Its totient is φ = 285385576.

The previous prime is 285385553. The next prime is 285385589. The reversal of 285385577 is 775583582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268828816 + 16556761 = 16396^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 285385577 - 2²⁶ = 218276713 is a prime.

It is not a weakly prime, because it can be changed into another prime (285385517) 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, 142692788 + 142692789.

It is an arithmetic number, because the mean of its divisors is an integer number (142692789).

Almost surely, 2^285385577 is an apocalyptic number.

It is an amenable number.

285385577 is a deficient number, since it is larger than the sum of its proper divisors (1).

285385577 is an equidigital number, since it uses as much as digits as its factorization.

285385577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352000, while the sum is 50.

The square root of 285385577 is about 16893.3589614381. The cubic root of 285385577 is about 658.3810773186.

The spelling of 285385577 in words is "two hundred eighty-five million, three hundred eighty-five thousand, five hundred seventy-seven".