855889849 has 2 divisors, whose sum is σ = 855889850. Its totient is φ = 855889848.

The previous prime is 855889829. The next prime is 855889861. The reversal of 855889849 is 948988558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477859600 + 378030249 = 21860^2 + 19443^2 .

It is a cyclic number.

It is not a de Polignac number, because 855889849 - 2⁵ = 855889817 is a prime.

It is not a weakly prime, because it can be changed into another prime (855889829) 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, 427944924 + 427944925.

It is an arithmetic number, because the mean of its divisors is an integer number (427944925).

Almost surely, 2^855889849 is an apocalyptic number.

It is an amenable number.

855889849 is a deficient number, since it is larger than the sum of its proper divisors (1).

855889849 is an equidigital number, since it uses as much as digits as its factorization.

855889849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33177600, while the sum is 64.

The square root of 855889849 is about 29255.5951742568. The cubic root of 855889849 is about 949.4511507458.

The spelling of 855889849 in words is "eight hundred fifty-five million, eight hundred eighty-nine thousand, eight hundred forty-nine".