878256787 has 2 divisors, whose sum is σ = 878256788. Its totient is φ = 878256786.

The previous prime is 878256763. The next prime is 878256887. The reversal of 878256787 is 787652878.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878256787 is a prime.

It is not a weakly prime, because it can be changed into another prime (878256887) 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, 439128393 + 439128394.

It is an arithmetic number, because the mean of its divisors is an integer number (439128394).

Almost surely, 2^878256787 is an apocalyptic number.

878256787 is a deficient number, since it is larger than the sum of its proper divisors (1).

878256787 is an equidigital number, since it uses as much as digits as its factorization.

878256787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10536960, while the sum is 58.

The square root of 878256787 is about 29635.3975340301. The cubic root of 878256787 is about 957.6507906050.

The spelling of 878256787 in words is "eight hundred seventy-eight million, two hundred fifty-six thousand, seven hundred eighty-seven".