849385709 has 24 divisors (see below), whose sum is σ = 939271680. Its totient is φ = 767037600.

The previous prime is 849385703. The next prime is 849385711. The reversal of 849385709 is 907583948.

It is a de Polignac number, because none of the positive numbers 2^k-849385709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849385703) 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, 794027 + ... + 795095.

It is an arithmetic number, because the mean of its divisors is an integer number (39136320).

Almost surely, 2^849385709 is an apocalyptic number.

It is an amenable number.

849385709 is a deficient number, since it is larger than the sum of its proper divisors (89885971).

849385709 is a wasteful number, since it uses less digits than its factorization.

849385709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 849385709 is about 29144.2225664024. Note that the first 3 decimals coincide. The cubic root of 849385709 is about 947.0399867595.

The spelling of 849385709 in words is "eight hundred forty-nine million, three hundred eighty-five thousand, seven hundred nine".