9866743 has 4 divisors (see below), whose sum is σ = 9968560. Its totient is φ = 9764928.

The previous prime is 9866741. The next prime is 9866761. The reversal of 9866743 is 3476689.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9866743 - 2¹ = 9866741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9866743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866741) 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, 50763 + ... + 50956.

It is an arithmetic number, because the mean of its divisors is an integer number (2492140).

Almost surely, 2^9866743 is an apocalyptic number.

9866743 is a deficient number, since it is larger than the sum of its proper divisors (101817).

9866743 is a wasteful number, since it uses less digits than its factorization.

9866743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101816.

The product of its digits is 217728, while the sum is 43.

The square root of 9866743 is about 3141.1372144496. The cubic root of 9866743 is about 214.4822081044.

It can be divided in two parts, 9866 and 743, that added together give a square (10609 = 103²).

The spelling of 9866743 in words is "nine million, eight hundred sixty-six thousand, seven hundred forty-three".