878122387 has 2 divisors, whose sum is σ = 878122388. Its totient is φ = 878122386.

The previous prime is 878122351. The next prime is 878122423. The reversal of 878122387 is 783221878.

878122387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (878122351) and next prime (878122423).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878122387 is a prime.

It is not a weakly prime, because it can be changed into another prime (878122087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439061193 + 439061194.

It is an arithmetic number, because the mean of its divisors is an integer number (439061194).

Almost surely, 2^878122387 is an apocalyptic number.

878122387 is a deficient number, since it is larger than the sum of its proper divisors (1).

878122387 is an equidigital number, since it uses as much as digits as its factorization.

878122387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 46.

The square root of 878122387 is about 29633.1298886905. The cubic root of 878122387 is about 957.6019382138.

The spelling of 878122387 in words is "eight hundred seventy-eight million, one hundred twenty-two thousand, three hundred eighty-seven".