8624989 has 4 divisors (see below), whose sum is σ = 8631580. Its totient is φ = 8618400.

The previous prime is 8624981. The next prime is 8624999. The reversal of 8624989 is 9894268.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 840889 + 7784100 = 917^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 8624989 - 2³ = 8624981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8624981) 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, 594 + ... + 4195.

It is an arithmetic number, because the mean of its divisors is an integer number (2157895).

Almost surely, 2^8624989 is an apocalyptic number.

It is an amenable number.

8624989 is a deficient number, since it is larger than the sum of its proper divisors (6591).

8624989 is a wasteful number, since it uses less digits than its factorization.

8624989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590.

The product of its digits is 248832, while the sum is 46.

The square root of 8624989 is about 2936.8331583527. The cubic root of 8624989 is about 205.0782093020.

The spelling of 8624989 in words is "eight million, six hundred twenty-four thousand, nine hundred eighty-nine".