9878851 has 2 divisors, whose sum is σ = 9878852. Its totient is φ = 9878850.

The previous prime is 9878839. The next prime is 9878857. The reversal of 9878851 is 1588789.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9878851 - 2¹¹ = 9876803 is a prime.

It is not a weakly prime, because it can be changed into another prime (9878857) 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, 4939425 + 4939426.

It is an arithmetic number, because the mean of its divisors is an integer number (4939426).

Almost surely, 2^9878851 is an apocalyptic number.

9878851 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878851 is an equidigital number, since it uses as much as digits as its factorization.

9878851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 46.

The square root of 9878851 is about 3143.0639509880. The cubic root of 9878851 is about 214.5699063791.

The spelling of 9878851 in words is "nine million, eight hundred seventy-eight thousand, eight hundred fifty-one".