878707439 has 2 divisors, whose sum is σ = 878707440. Its totient is φ = 878707438.

The previous prime is 878707399. The next prime is 878707481. The reversal of 878707439 is 934707878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 878707439 - 2¹⁶ = 878641903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878707499) 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, 439353719 + 439353720.

It is an arithmetic number, because the mean of its divisors is an integer number (439353720).

Almost surely, 2^878707439 is an apocalyptic number.

878707439 is a deficient number, since it is larger than the sum of its proper divisors (1).

878707439 is an equidigital number, since it uses as much as digits as its factorization.

878707439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The square root of 878707439 is about 29642.9998313261. Note that the first 3 decimals coincide. The cubic root of 878707439 is about 957.8145595072.

The spelling of 878707439 in words is "eight hundred seventy-eight million, seven hundred seven thousand, four hundred thirty-nine".