845839 has 4 divisors (see below), whose sum is σ = 849856. Its totient is φ = 841824.

The previous prime is 845833. The next prime is 845849. The reversal of 845839 is 938548.

845839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845839 is a prime.

It is a super-2 number, since 2×845839² = 1430887227842, which contains 22 as substring.

It is a Duffinian number.

845839 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 845798 and 845807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674 + ... + 2119.

It is an arithmetic number, because the mean of its divisors is an integer number (212464).

2⁸⁴⁵⁸³⁹ is an apocalyptic number.

845839 is a deficient number, since it is larger than the sum of its proper divisors (4017).

845839 is a wasteful number, since it uses less digits than its factorization.

845839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016.

The product of its digits is 34560, while the sum is 37.

The square root of 845839 is about 919.6950581579. The cubic root of 845839 is about 94.5719989178.

The spelling of 845839 in words is "eight hundred forty-five thousand, eight hundred thirty-nine".