6624989 has 8 divisors (see below), whose sum is σ = 7900800. Its totient is φ = 5431536.

The previous prime is 6624973. The next prime is 6625001. The reversal of 6624989 is 9894266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6624989 - 2⁴ = 6624973 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624589) 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 7 ways as a sum of consecutive naturals, for example, 20414 + ... + 20735.

It is an arithmetic number, because the mean of its divisors is an integer number (987600).

Almost surely, 2^6624989 is an apocalyptic number.

It is an amenable number.

6624989 is a deficient number, since it is larger than the sum of its proper divisors (1275811).

6624989 is a wasteful number, since it uses less digits than its factorization.

6624989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41179.

The product of its digits is 186624, while the sum is 44.

The square root of 6624989 is about 2573.9053984170. The cubic root of 6624989 is about 187.8141837635.

The spelling of 6624989 in words is "six million, six hundred twenty-four thousand, nine hundred eighty-nine".