11643403 has 4 divisors (see below), whose sum is σ = 11664648. Its totient is φ = 11622160.

The previous prime is 11643397. The next prime is 11643421. The reversal of 11643403 is 30434611.

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 11643403 - 2¹⁷ = 11512331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11643103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9778 + ... + 10903.

It is an arithmetic number, because the mean of its divisors is an integer number (2916162).

Almost surely, 2^11643403 is an apocalyptic number.

11643403 is a deficient number, since it is larger than the sum of its proper divisors (21245).

11643403 is an equidigital number, since it uses as much as digits as its factorization.

11643403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21244.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 11643403 is about 3412.2431038834. The cubic root of 11643403 is about 226.6522196194.

The spelling of 11643403 in words is "eleven million, six hundred forty-three thousand, four hundred three".