11646643 has 4 divisors (see below), whose sum is σ = 11787048. Its totient is φ = 11506240.

The previous prime is 11646631. The next prime is 11646653. The reversal of 11646643 is 34664611.

11646643 is digitally balanced in base 3, 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 a de Polignac number, because none of the positive numbers 2^k-11646643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11646623) 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, 70078 + ... + 70243.

It is an arithmetic number, because the mean of its divisors is an integer number (2946762).

Almost surely, 2^11646643 is an apocalyptic number.

11646643 is a deficient number, since it is larger than the sum of its proper divisors (140405).

11646643 is an equidigital number, since it uses as much as digits as its factorization.

11646643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140404.

The product of its digits is 10368, while the sum is 31.

The square root of 11646643 is about 3412.7178318754. The cubic root of 11646643 is about 226.6732411107.

The spelling of 11646643 in words is "eleven million, six hundred forty-six thousand, six hundred forty-three".