9936643 has 4 divisors (see below), whose sum is σ = 9997768. Its totient is φ = 9875520.

The previous prime is 9936631. The next prime is 9936649. The reversal of 9936643 is 3466399.

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 9936643 - 2⁵ = 9936611 is a prime.

It is a super-3 number, since 3×9936643³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9936596 and 9936605.

It is not an unprimeable number, because it can be changed into a prime (9936649) by changing a digit.

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, 30318 + ... + 30643.

It is an arithmetic number, because the mean of its divisors is an integer number (2499442).

Almost surely, 2^9936643 is an apocalyptic number.

9936643 is a deficient number, since it is larger than the sum of its proper divisors (61125).

9936643 is a wasteful number, since it uses less digits than its factorization.

9936643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61124.

The product of its digits is 104976, while the sum is 40.

The square root of 9936643 is about 3152.2441212571. The cubic root of 9936643 is about 214.9875096404.

The spelling of 9936643 in words is "nine million, nine hundred thirty-six thousand, six hundred forty-three".