11640543 has 4 divisors (see below), whose sum is σ = 15520728. Its totient is φ = 7760360.

The previous prime is 11640539. The next prime is 11640547. The reversal of 11640543 is 34504611.

11640543 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 an interprime number because it is at equal distance from previous prime (11640539) and next prime (11640547).

It is a cyclic number.

It is not a de Polignac number, because 11640543 - 2² = 11640539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640547) 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, 1940088 + ... + 1940093.

It is an arithmetic number, because the mean of its divisors is an integer number (3880182).

Almost surely, 2^11640543 is an apocalyptic number.

11640543 is a deficient number, since it is larger than the sum of its proper divisors (3880185).

11640543 is an equidigital number, since it uses as much as digits as its factorization.

11640543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880184.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 11640543 is about 3411.8239989777. The cubic root of 11640543 is about 226.6336603708.

The spelling of 11640543 in words is "eleven million, six hundred forty thousand, five hundred forty-three".