878539 has 2 divisors, whose sum is σ = 878540. Its totient is φ = 878538.

The previous prime is 878513. The next prime is 878551. The reversal of 878539 is 935878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878539 - 2⁷ = 878411 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (878039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439269 + 439270.

It is an arithmetic number, because the mean of its divisors is an integer number (439270).

2⁸⁷⁸⁵³⁹ is an apocalyptic number.

878539 is a deficient number, since it is larger than the sum of its proper divisors (1).

878539 is an equidigital number, since it uses as much as digits as its factorization.

878539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 878539 is about 937.3041128684. The cubic root of 878539 is about 95.7753354595.

The spelling of 878539 in words is "eight hundred seventy-eight thousand, five hundred thirty-nine".