849384891 has 24 divisors (see below), whose sum is σ = 1257896640. Its totient is φ = 551997936.

The previous prime is 849384881. The next prime is 849384901. The reversal of 849384891 is 198483948.

849384891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (849384881) and next prime (849384901).

It is not a de Polignac number, because 849384891 - 2¹⁹ = 848860603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (849384881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225300 + ... + 229038.

It is an arithmetic number, because the mean of its divisors is an integer number (52412360).

Almost surely, 2^849384891 is an apocalyptic number.

849384891 is a deficient number, since it is larger than the sum of its proper divisors (408511749).

849384891 is a wasteful number, since it uses less digits than its factorization.

849384891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375 (or 4372 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 849384891 is about 29144.2085327428. The cubic root of 849384891 is about 947.0396827441.

The spelling of 849384891 in words is "eight hundred forty-nine million, three hundred eighty-four thousand, eight hundred ninety-one".