85842047 has 2 divisors, whose sum is σ = 85842048. Its totient is φ = 85842046.

The previous prime is 85842037. The next prime is 85842077. The reversal of 85842047 is 74024858.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85842047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85842047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85842037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42921023 + 42921024.

It is an arithmetic number, because the mean of its divisors is an integer number (42921024).

Almost surely, 2^85842047 is an apocalyptic number.

85842047 is a deficient number, since it is larger than the sum of its proper divisors (1).

85842047 is an equidigital number, since it uses as much as digits as its factorization.

85842047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 85842047 is about 9265.0983265155. The cubic root of 85842047 is about 441.1300960095.

The spelling of 85842047 in words is "eighty-five million, eight hundred forty-two thousand, forty-seven".