13680543 has 4 divisors (see below), whose sum is σ = 18240728. Its totient is φ = 9120360.

The previous prime is 13680539. The next prime is 13680553. The reversal of 13680543 is 34508631.

13680543 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 not a de Polignac number, because 13680543 - 2² = 13680539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13680543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680553) 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, 2280088 + ... + 2280093.

It is an arithmetic number, because the mean of its divisors is an integer number (4560182).

Almost surely, 2^13680543 is an apocalyptic number.

13680543 is a deficient number, since it is larger than the sum of its proper divisors (4560185).

13680543 is an equidigital number, since it uses as much as digits as its factorization.

13680543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560184.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 13680543 is about 3698.7218062460. The cubic root of 13680543 is about 239.1669206185.

The spelling of 13680543 in words is "thirteen million, six hundred eighty thousand, five hundred forty-three".