878642339 has 2 divisors, whose sum is σ = 878642340. Its totient is φ = 878642338.

The previous prime is 878642311. The next prime is 878642371. The reversal of 878642339 is 933246878.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878642339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (878647339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439321169 + 439321170.

It is an arithmetic number, because the mean of its divisors is an integer number (439321170).

Almost surely, 2^878642339 is an apocalyptic number.

878642339 is a deficient number, since it is larger than the sum of its proper divisors (1).

878642339 is an equidigital number, since it uses as much as digits as its factorization.

878642339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The square root of 878642339 is about 29641.9017439840. The cubic root of 878642339 is about 957.7909053439.

The spelling of 878642339 in words is "eight hundred seventy-eight million, six hundred forty-two thousand, three hundred thirty-nine".