9878249 has 2 divisors, whose sum is σ = 9878250. Its totient is φ = 9878248.

The previous prime is 9878227. The next prime is 9878251. The reversal of 9878249 is 9428789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8082649 + 1795600 = 2843^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 9878249 - 2²⁰ = 8829673 is a prime.

Together with 9878251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9878749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939124 + 4939125.

It is an arithmetic number, because the mean of its divisors is an integer number (4939125).

Almost surely, 2^9878249 is an apocalyptic number.

It is an amenable number.

9878249 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878249 is an equidigital number, since it uses as much as digits as its factorization.

9878249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 9878249 is about 3142.9681831034. The cubic root of 9878249 is about 214.5655477849.

The spelling of 9878249 in words is "nine million, eight hundred seventy-eight thousand, two hundred forty-nine".