285856406839 has 2 divisors, whose sum is σ = 285856406840. Its totient is φ = 285856406838.

The previous prime is 285856406789. The next prime is 285856406861. The reversal of 285856406839 is 938604658582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285856406839 - 2²⁹ = 285319535927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285856406879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142928203419 + 142928203420.

It is an arithmetic number, because the mean of its divisors is an integer number (142928203420).

Almost surely, 2^285856406839 is an apocalyptic number.

285856406839 is a deficient number, since it is larger than the sum of its proper divisors (1).

285856406839 is an equidigital number, since it uses as much as digits as its factorization.

285856406839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 99532800, while the sum is 64.

The spelling of 285856406839 in words is "two hundred eighty-five billion, eight hundred fifty-six million, four hundred six thousand, eight hundred thirty-nine".