6637489 has 8 divisors (see below), whose sum is σ = 6790208. Its totient is φ = 6486480.

The previous prime is 6637487. The next prime is 6637571. The reversal of 6637489 is 9847366.

It is a happy number.

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 6637489 - 2¹ = 6637487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6637487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10204 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (848776).

Almost surely, 2^6637489 is an apocalyptic number.

It is an amenable number.

6637489 is a deficient number, since it is larger than the sum of its proper divisors (152719).

6637489 is a wasteful number, since it uses less digits than its factorization.

6637489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its digits is 217728, while the sum is 43.

The square root of 6637489 is about 2576.3324707809. The cubic root of 6637489 is about 187.9322318746.

The spelling of 6637489 in words is "six million, six hundred thirty-seven thousand, four hundred eighty-nine".