13775543 has 4 divisors (see below), whose sum is σ = 13787520. Its totient is φ = 13763568.

The previous prime is 13775539. The next prime is 13775599. The reversal of 13775543 is 34557731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34557731 = 13 ⋅2658287.

It is a cyclic number.

It is not a de Polignac number, because 13775543 - 2² = 13775539 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 (13775533) 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, 4055 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (3446880).

Almost surely, 2^13775543 is an apocalyptic number.

13775543 is a deficient number, since it is larger than the sum of its proper divisors (11977).

13775543 is a wasteful number, since it uses less digits than its factorization.

13775543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11976.

The product of its digits is 44100, while the sum is 35.

The square root of 13775543 is about 3711.5418628920. The cubic root of 13775543 is about 239.7192492536.

The spelling of 13775543 in words is "thirteen million, seven hundred seventy-five thousand, five hundred forty-three".