8622559 has 4 divisors (see below), whose sum is σ = 9406440. Its totient is φ = 7838680.

The previous prime is 8622529. The next prime is 8622563. The reversal of 8622559 is 9552268.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8622559 - 2¹⁷ = 8491487 is a prime.

It is a Duffinian number.

8622559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8622529) 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 in 3 ways as a sum of consecutive naturals, for example, 391924 + ... + 391945.

It is an arithmetic number, because the mean of its divisors is an integer number (2351610).

Almost surely, 2^8622559 is an apocalyptic number.

8622559 is a deficient number, since it is larger than the sum of its proper divisors (783881).

8622559 is a wasteful number, since it uses less digits than its factorization.

8622559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783880.

The product of its digits is 43200, while the sum is 37.

The square root of 8622559 is about 2936.4194182712. The cubic root of 8622559 is about 205.0589479497.

The spelling of 8622559 in words is "eight million, six hundred twenty-two thousand, five hundred fifty-nine".