9945686 has 4 divisors (see below), whose sum is σ = 14918532. Its totient is φ = 4972842.

The previous prime is 9945679. The next prime is 9945707. The reversal of 9945686 is 6865499.

9945686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9945686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2486420 + ... + 2486423.

It is an arithmetic number, because the mean of its divisors is an integer number (3729633).

Almost surely, 2^9945686 is an apocalyptic number.

9945686 is a deficient number, since it is larger than the sum of its proper divisors (4972846).

9945686 is a wasteful number, since it uses less digits than its factorization.

9945686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4972845.

The product of its digits is 466560, while the sum is 47.

The square root of 9945686 is about 3153.6781700104. The cubic root of 9945686 is about 215.0527074671.

The spelling of 9945686 in words is "nine million, nine hundred forty-five thousand, six hundred eighty-six".