85042427839 has 2 divisors, whose sum is σ = 85042427840. Its totient is φ = 85042427838.

The previous prime is 85042427773. The next prime is 85042427843. The reversal of 85042427839 is 93872424058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85042427839 - 2¹⁷ = 85042296767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85042427039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42521213919 + 42521213920.

It is an arithmetic number, because the mean of its divisors is an integer number (42521213920).

Almost surely, 2^85042427839 is an apocalyptic number.

85042427839 is a deficient number, since it is larger than the sum of its proper divisors (1).

85042427839 is an equidigital number, since it uses as much as digits as its factorization.

85042427839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 85042427839 in words is "eighty-five billion, forty-two million, four hundred twenty-seven thousand, eight hundred thirty-nine".