849139 has 4 divisors (see below), whose sum is σ = 851040. Its totient is φ = 847240.

The previous prime is 849131. The next prime is 849143. The reversal of 849139 is 931948.

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

It is a cyclic number.

It is not a de Polignac number, because 849139 - 2³ = 849131 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (212760).

2⁸⁴⁹¹³⁹ is an apocalyptic number.

849139 is a deficient number, since it is larger than the sum of its proper divisors (1901).

849139 is a wasteful number, since it uses less digits than its factorization.

849139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900.

The product of its digits is 7776, while the sum is 34.

The square root of 849139 is about 921.4873846125. The cubic root of 849139 is about 94.6948286797.

The spelling of 849139 in words is "eight hundred forty-nine thousand, one hundred thirty-nine".