9688561 has 8 divisors (see below), whose sum is σ = 9990504. Its totient is φ = 9388800.

The previous prime is 9688531. The next prime is 9688571. The reversal of 9688561 is 1658869.

It can be written as a sum of positive squares in 4 ways, for example, as 5198400 + 4490161 = 2280^2 + 2119^2 .

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 9688561 - 2¹³ = 9680369 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 (9688501) 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, 14511 + ... + 15163.

It is an arithmetic number, because the mean of its divisors is an integer number (1248813).

Almost surely, 2^9688561 is an apocalyptic number.

It is an amenable number.

9688561 is a deficient number, since it is larger than the sum of its proper divisors (301943).

9688561 is a wasteful number, since it uses less digits than its factorization.

9688561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its digits is 103680, while the sum is 43.

The square root of 9688561 is about 3112.6453379722. The cubic root of 9688561 is about 213.1832568073.

The spelling of 9688561 in words is "nine million, six hundred eighty-eight thousand, five hundred sixty-one".