285679871 has 2 divisors, whose sum is σ = 285679872. Its totient is φ = 285679870.

The previous prime is 285679861. The next prime is 285679903. The reversal of 285679871 is 178976582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285679871 - 2²⁶ = 218571007 is a prime.

It is a super-3 number, since 3×285679871³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285679861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142839935 + 142839936.

It is an arithmetic number, because the mean of its divisors is an integer number (142839936).

Almost surely, 2^285679871 is an apocalyptic number.

285679871 is a deficient number, since it is larger than the sum of its proper divisors (1).

285679871 is an equidigital number, since it uses as much as digits as its factorization.

285679871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 53.

The square root of 285679871 is about 16902.0670629364. The cubic root of 285679871 is about 658.6073104719.

The spelling of 285679871 in words is "two hundred eighty-five million, six hundred seventy-nine thousand, eight hundred seventy-one".