878940833 has 4 divisors (see below), whose sum is σ = 879009300. Its totient is φ = 878872368.

The previous prime is 878940823. The next prime is 878940841. The reversal of 878940833 is 338049878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 338049878 = 2 ⋅169024939.

It can be written as a sum of positive squares in 2 ways, for example, as 23261329 + 855679504 = 4823^2 + 29252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878940833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878940823) 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, 8558 + ... + 42791.

It is an arithmetic number, because the mean of its divisors is an integer number (219752325).

It is a Poulet number, since it divides 2^878940832-1.

Almost surely, 2^878940833 is an apocalyptic number.

878940833 is the 17117-th octagonal number.

It is an amenable number.

878940833 is a deficient number, since it is larger than the sum of its proper divisors (68467).

878940833 is a wasteful number, since it uses less digits than its factorization.

878940833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68466.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 878940833 is about 29646.9363172656. The cubic root of 878940833 is about 957.8993538965.

The spelling of 878940833 in words is "eight hundred seventy-eight million, nine hundred forty thousand, eight hundred thirty-three".