285871693 has 2 divisors, whose sum is σ = 285871694. Its totient is φ = 285871692.

The previous prime is 285871627. The next prime is 285871717. The reversal of 285871693 is 396178582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242798724 + 43072969 = 15582^2 + 6563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285871693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285877693) 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, 142935846 + 142935847.

It is an arithmetic number, because the mean of its divisors is an integer number (142935847).

Almost surely, 2^285871693 is an apocalyptic number.

It is an amenable number.

285871693 is a deficient number, since it is larger than the sum of its proper divisors (1).

285871693 is an equidigital number, since it uses as much as digits as its factorization.

285871693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 285871693 is about 16907.7406237498. The cubic root of 285871693 is about 658.7546865136.

The spelling of 285871693 in words is "two hundred eighty-five million, eight hundred seventy-one thousand, six hundred ninety-three".