13543073 has 4 divisors (see below), whose sum is σ = 13909140. Its totient is φ = 13177008.

The previous prime is 13543069. The next prime is 13543091. The reversal of 13543073 is 37034531.

13543073 is digitally balanced in base 2, 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 can be written as a sum of positive squares in 2 ways, for example, as 13162384 + 380689 = 3628^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 13543073 - 2² = 13543069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13543973) 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, 182978 + ... + 183051.

It is an arithmetic number, because the mean of its divisors is an integer number (3477285).

Almost surely, 2^13543073 is an apocalyptic number.

It is an amenable number.

13543073 is a deficient number, since it is larger than the sum of its proper divisors (366067).

13543073 is an equidigital number, since it uses as much as digits as its factorization.

13543073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366066.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 13543073 is about 3680.0914390814. The cubic root of 13543073 is about 238.3631264476.

The spelling of 13543073 in words is "thirteen million, five hundred forty-three thousand, seventy-three".