8559491 has 2 divisors, whose sum is σ = 8559492. Its totient is φ = 8559490.

The previous prime is 8559487. The next prime is 8559511. The reversal of 8559491 is 1949558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8559491 - 2² = 8559487 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8559401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4279745 + 4279746.

It is an arithmetic number, because the mean of its divisors is an integer number (4279746).

Almost surely, 2^8559491 is an apocalyptic number.

8559491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8559491 is an equidigital number, since it uses as much as digits as its factorization.

8559491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 8559491 is about 2925.6607800632. The cubic root of 8559491 is about 204.5577696798.

The spelling of 8559491 in words is "eight million, five hundred fifty-nine thousand, four hundred ninety-one".