849739 has 4 divisors (see below), whose sum is σ = 927000. Its totient is φ = 772480.

The previous prime is 849733. The next prime is 849743. The reversal of 849739 is 937948.

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 849739 - 2³ = 849731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849731) 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, 38614 + ... + 38635.

It is an arithmetic number, because the mean of its divisors is an integer number (231750).

2⁸⁴⁹⁷³⁹ is an apocalyptic number.

849739 is a deficient number, since it is larger than the sum of its proper divisors (77261).

849739 is a wasteful number, since it uses less digits than its factorization.

849739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77260.

The product of its digits is 54432, while the sum is 40.

The square root of 849739 is about 921.8128877381. The cubic root of 849739 is about 94.7171271570.

Subtracting 849739 from its reverse (937948), we obtain a square (88209 = 297²).

The spelling of 849739 in words is "eight hundred forty-nine thousand, seven hundred thirty-nine".