9878567 has 2 divisors, whose sum is σ = 9878568. Its totient is φ = 9878566.

The previous prime is 9878563. The next prime is 9878599. The reversal of 9878567 is 7658789.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9878567 - 2² = 9878563 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9878563) 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, 4939283 + 4939284.

It is an arithmetic number, because the mean of its divisors is an integer number (4939284).

Almost surely, 2^9878567 is an apocalyptic number.

9878567 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878567 is an equidigital number, since it uses as much as digits as its factorization.

9878567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 50.

The square root of 9878567 is about 3143.0187718179. The cubic root of 9878567 is about 214.5678501873.

The spelling of 9878567 in words is "nine million, eight hundred seventy-eight thousand, five hundred sixty-seven".