9681745 has 4 divisors (see below), whose sum is σ = 11618100. Its totient is φ = 7745392.

The previous prime is 9681739. The next prime is 9681757. The reversal of 9681745 is 5471869.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 8020224 = 1289^2 + 2832^2 .

It is a cyclic number.

It is not a de Polignac number, because 9681745 - 2⁹ = 9681233 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9681698 and 9681707.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 968170 + ... + 968179.

It is an arithmetic number, because the mean of its divisors is an integer number (2904525).

Almost surely, 2^9681745 is an apocalyptic number.

It is an amenable number.

9681745 is a deficient number, since it is larger than the sum of its proper divisors (1936355).

9681745 is a wasteful number, since it uses less digits than its factorization.

9681745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936354.

The product of its digits is 60480, while the sum is 40.

The square root of 9681745 is about 3111.5502567048. The cubic root of 9681745 is about 213.1332528917.

The spelling of 9681745 in words is "nine million, six hundred eighty-one thousand, seven hundred forty-five".