849212389 has 4 divisors (see below), whose sum is σ = 850311756. Its totient is φ = 848113024.

The previous prime is 849212387. The next prime is 849212411. The reversal of 849212389 is 983212948.

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 518336289 + 330876100 = 22767^2 + 18190^2 .

It is a cyclic number.

It is not a de Polignac number, because 849212389 - 2¹ = 849212387 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 (849212381) 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 in 3 ways as a sum of consecutive naturals, for example, 548524 + ... + 550069.

It is an arithmetic number, because the mean of its divisors is an integer number (212577939).

Almost surely, 2^849212389 is an apocalyptic number.

It is an amenable number.

849212389 is a deficient number, since it is larger than the sum of its proper divisors (1099367).

849212389 is a wasteful number, since it uses less digits than its factorization.

849212389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099366.

The product of its digits is 248832, while the sum is 46.

The square root of 849212389 is about 29141.2489265646. The cubic root of 849212389 is about 946.9755668167.

The spelling of 849212389 in words is "eight hundred forty-nine million, two hundred twelve thousand, three hundred eighty-nine".