9686645 has 4 divisors (see below), whose sum is σ = 11623980. Its totient is φ = 7749312.

The previous prime is 9686629. The next prime is 9686647. The reversal of 9686645 is 5466869.

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 4990756 + 4695889 = 2234^2 + 2167^2 .

It is a cyclic number.

It is not a de Polignac number, because 9686645 - 2⁴ = 9686629 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9686596 and 9686605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9686647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968660 + ... + 968669.

It is an arithmetic number, because the mean of its divisors is an integer number (2905995).

Almost surely, 2^9686645 is an apocalyptic number.

It is an amenable number.

9686645 is a deficient number, since it is larger than the sum of its proper divisors (1937335).

9686645 is a wasteful number, since it uses less digits than its factorization.

9686645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937334.

The product of its digits is 311040, while the sum is 44.

The square root of 9686645 is about 3112.3375459612. The cubic root of 9686645 is about 213.1692029126.

Subtracting from 9686645 its sum of digits (44), we obtain a triangular number (9686601 = T₄₄₀₁).

The spelling of 9686645 in words is "nine million, six hundred eighty-six thousand, six hundred forty-five".