11389543 has 4 divisors (see below), whose sum is σ = 12424968. Its totient is φ = 10354120.

The previous prime is 11389529. The next prime is 11389549. The reversal of 11389543 is 34598311.

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-11389543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11389499 and 11389508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11389549) 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, 517696 + ... + 517717.

It is an arithmetic number, because the mean of its divisors is an integer number (3106242).

Almost surely, 2^11389543 is an apocalyptic number.

11389543 is a deficient number, since it is larger than the sum of its proper divisors (1035425).

11389543 is a wasteful number, since it uses less digits than its factorization.

11389543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035424.

The product of its digits is 12960, while the sum is 34.

The square root of 11389543 is about 3374.8396998969. The cubic root of 11389543 is about 224.9928754946.

The spelling of 11389543 in words is "eleven million, three hundred eighty-nine thousand, five hundred forty-three".