11543711 has 4 divisors (see below), whose sum is σ = 11941800. Its totient is φ = 11145624.

The previous prime is 11543683. The next prime is 11543713. The reversal of 11543711 is 11734511.

It is a happy number.

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 11543711 - 2⁶ = 11543647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543713) 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, 199001 + ... + 199058.

It is an arithmetic number, because the mean of its divisors is an integer number (2985450).

Almost surely, 2^11543711 is an apocalyptic number.

11543711 is a deficient number, since it is larger than the sum of its proper divisors (398089).

11543711 is an equidigital number, since it uses as much as digits as its factorization.

11543711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398088.

The product of its digits is 420, while the sum is 23.

The square root of 11543711 is about 3397.6037143846. The cubic root of 11543711 is about 226.0034914750.

The spelling of 11543711 in words is "eleven million, five hundred forty-three thousand, seven hundred eleven".