855085783 has 2 divisors, whose sum is σ = 855085784. Its totient is φ = 855085782.

The previous prime is 855085769. The next prime is 855085787. The reversal of 855085783 is 387580558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855085783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855085787) 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, 427542891 + 427542892.

It is an arithmetic number, because the mean of its divisors is an integer number (427542892).

Almost surely, 2^855085783 is an apocalyptic number.

855085783 is a deficient number, since it is larger than the sum of its proper divisors (1).

855085783 is an equidigital number, since it uses as much as digits as its factorization.

855085783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344000, while the sum is 49.

The square root of 855085783 is about 29241.8498559855. The cubic root of 855085783 is about 949.1537368592.

The spelling of 855085783 in words is "eight hundred fifty-five million, eighty-five thousand, seven hundred eighty-three".