8561867 has 2 divisors, whose sum is σ = 8561868. Its totient is φ = 8561866.

The previous prime is 8561857. The next prime is 8561869. The reversal of 8561867 is 7681658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8561867 - 2⁶ = 8561803 is a prime.

Together with 8561869, 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 (8561869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4280933 + 4280934.

It is an arithmetic number, because the mean of its divisors is an integer number (4280934).

Almost surely, 2^8561867 is an apocalyptic number.

8561867 is a deficient number, since it is larger than the sum of its proper divisors (1).

8561867 is an equidigital number, since it uses as much as digits as its factorization.

8561867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 8561867 is about 2926.0668140013. The cubic root of 8561867 is about 204.5766954273.

The spelling of 8561867 in words is "eight million, five hundred sixty-one thousand, eight hundred sixty-seven".