9878044867 has 2 divisors, whose sum is σ = 9878044868. Its totient is φ = 9878044866.

The previous prime is 9878044811. The next prime is 9878044909. The reversal of 9878044867 is 7684408789.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9878044867 - 2¹⁵ = 9878012099 is a prime.

It is not a weakly prime, because it can be changed into another prime (9878045867) 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, 4939022433 + 4939022434.

It is an arithmetic number, because the mean of its divisors is an integer number (4939022434).

Almost surely, 2^9878044867 is an apocalyptic number.

9878044867 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878044867 is an equidigital number, since it uses as much as digits as its factorization.

9878044867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21676032, while the sum is 61.

The square root of 9878044867 is about 99388.3537795048. The cubic root of 9878044867 is about 2145.6406978307.

The spelling of 9878044867 in words is "nine billion, eight hundred seventy-eight million, forty-four thousand, eight hundred sixty-seven".