830845 has 4 divisors (see below), whose sum is σ = 997020. Its totient is φ = 664672.

The previous prime is 830839. The next prime is 830849. The reversal of 830845 is 548038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548038 = 2 ⋅274019.

It can be written as a sum of positive squares in 2 ways, for example, as 423801 + 407044 = 651^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 830845 - 2¹¹ = 828797 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830849) 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, 83080 + ... + 83089.

It is an arithmetic number, because the mean of its divisors is an integer number (249255).

2⁸³⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

830845 is a deficient number, since it is larger than the sum of its proper divisors (166175).

830845 is a wasteful number, since it uses less digits than its factorization.

830845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166174.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 830845 is about 911.5069939392. The cubic root of 830845 is about 94.0098450530.

The spelling of 830845 in words is "eight hundred thirty thousand, eight hundred forty-five".