9986623 has 4 divisors (see below), whose sum is σ = 10420848. Its totient is φ = 9552400.

The previous prime is 9986611. The next prime is 9986651. The reversal of 9986623 is 3266899.

9986623 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 cyclic number.

It is not a de Polignac number, because 9986623 - 2⁵ = 9986591 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 9986623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986653) 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, 217078 + ... + 217123.

It is an arithmetic number, because the mean of its divisors is an integer number (2605212).

Almost surely, 2^9986623 is an apocalyptic number.

9986623 is a deficient number, since it is larger than the sum of its proper divisors (434225).

9986623 is a wasteful number, since it uses less digits than its factorization.

9986623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434224.

The product of its digits is 139968, while the sum is 43.

The square root of 9986623 is about 3160.1618629431. The cubic root of 9986623 is about 215.3473598926.

It can be divided in two parts, 9986 and 623, that added together give a square (10609 = 103²).

The spelling of 9986623 in words is "nine million, nine hundred eighty-six thousand, six hundred twenty-three".