878831 has 2 divisors, whose sum is σ = 878832. Its totient is φ = 878830.

The previous prime is 878821. The next prime is 878833. The reversal of 878831 is 138878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878831 - 2¹⁴ = 862447 is a prime.

It is a super-2 number, since 2×878831² = 1544687853122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 878833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 878791 and 878800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878833) 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 as a sum of consecutive naturals, namely, 439415 + 439416.

It is an arithmetic number, because the mean of its divisors is an integer number (439416).

2⁸⁷⁸⁸³¹ is an apocalyptic number.

878831 is a deficient number, since it is larger than the sum of its proper divisors (1).

878831 is an equidigital number, since it uses as much as digits as its factorization.

878831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 878831 is about 937.4598658076. The cubic root of 878831 is about 95.7859452332.

The spelling of 878831 in words is "eight hundred seventy-eight thousand, eight hundred thirty-one".