855085787 has 2 divisors, whose sum is σ = 855085788. Its totient is φ = 855085786.

The previous prime is 855085783. The next prime is 855085817. The reversal of 855085787 is 787580558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855085787 - 2² = 855085783 is a prime.

It is not a weakly prime, because it can be changed into another prime (855085783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427542893 + 427542894.

It is an arithmetic number, because the mean of its divisors is an integer number (427542894).

Almost surely, 2^855085787 is an apocalyptic number.

855085787 is a deficient number, since it is larger than the sum of its proper divisors (1).

855085787 is an equidigital number, since it uses as much as digits as its factorization.

855085787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136000, while the sum is 53.

The square root of 855085787 is about 29241.8499243806. The cubic root of 855085787 is about 949.1537383392.

The spelling of 855085787 in words is "eight hundred fifty-five million, eighty-five thousand, seven hundred eighty-seven".