9638661 has 8 divisors (see below), whose sum is σ = 12938400. Its totient is φ = 6382352.

The previous prime is 9638659. The next prime is 9638743. The reversal of 9638661 is 1668369.

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 9638661 - 2¹ = 9638659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9638621) 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, 10335 + ... + 11228.

It is an arithmetic number, because the mean of its divisors is an integer number (1617300).

Almost surely, 2^9638661 is an apocalyptic number.

It is an amenable number.

9638661 is a deficient number, since it is larger than the sum of its proper divisors (3299739).

9638661 is a wasteful number, since it uses less digits than its factorization.

9638661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21715.

The product of its digits is 46656, while the sum is 39.

The square root of 9638661 is about 3104.6193003330. The cubic root of 9638661 is about 212.8166333904.

The spelling of 9638661 in words is "nine million, six hundred thirty-eight thousand, six hundred sixty-one".