9661709 has 8 divisors (see below), whose sum is σ = 10271040. Its totient is φ = 9062496.

The previous prime is 9661703. The next prime is 9661711. The reversal of 9661709 is 9071669.

9661709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9661709 - 2⁴ = 9661693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661703) 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, 512 + ... + 4425.

It is an arithmetic number, because the mean of its divisors is an integer number (1283880).

Almost surely, 2^9661709 is an apocalyptic number.

It is an amenable number.

9661709 is a deficient number, since it is larger than the sum of its proper divisors (609331).

9661709 is a wasteful number, since it uses less digits than its factorization.

9661709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 9661709 is about 3108.3289722936. The cubic root of 9661709 is about 212.9861276572.

The spelling of 9661709 in words is "nine million, six hundred sixty-one thousand, seven hundred nine".