858948985 has 4 divisors (see below), whose sum is σ = 1030738788. Its totient is φ = 687159184.

The previous prime is 858948967. The next prime is 858948997. The reversal of 858948985 is 589849858.

858948985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164942649 + 694006336 = 12843^2 + 26344^2 .

It is a cyclic number.

It is not a de Polignac number, because 858948985 - 2¹⁷ = 858817913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85894894 + ... + 85894903.

It is an arithmetic number, because the mean of its divisors is an integer number (257684697).

Almost surely, 2^858948985 is an apocalyptic number.

It is an amenable number.

858948985 is a deficient number, since it is larger than the sum of its proper divisors (171789803).

858948985 is a wasteful number, since it uses less digits than its factorization.

858948985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171789802.

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

The square root of 858948985 is about 29307.8314619147. The cubic root of 858948985 is about 950.5809871828.

The spelling of 858948985 in words is "eight hundred fifty-eight million, nine hundred forty-eight thousand, nine hundred eighty-five".