11603643 has 4 divisors (see below), whose sum is σ = 15471528. Its totient is φ = 7735760.

The previous prime is 11603621. The next prime is 11603677. The reversal of 11603643 is 34630611.

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 11603643 - 2⁵ = 11603611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11603693) 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, 1933938 + ... + 1933943.

It is an arithmetic number, because the mean of its divisors is an integer number (3867882).

Almost surely, 2^11603643 is an apocalyptic number.

11603643 is a deficient number, since it is larger than the sum of its proper divisors (3867885).

11603643 is an equidigital number, since it uses as much as digits as its factorization.

11603643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867884.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 11603643 is about 3406.4120420172. The cubic root of 11603643 is about 226.3939340336.

It can be divided in two parts, 11603 and 643, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 11603643 in words is "eleven million, six hundred three thousand, six hundred forty-three".