13505705 has 8 divisors (see below), whose sum is σ = 16472904. Its totient is φ = 10627200.

The previous prime is 13505671. The next prime is 13505717. The reversal of 13505705 is 50750531.

13505705 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 234256 + 13271449 = 484^2 + 3643^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13505705 - 2⁶ = 13505641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21836 + ... + 22445.

It is an arithmetic number, because the mean of its divisors is an integer number (2059113).

Almost surely, 2^13505705 is an apocalyptic number.

It is an amenable number.

13505705 is a deficient number, since it is larger than the sum of its proper divisors (2967199).

13505705 is an equidigital number, since it uses as much as digits as its factorization.

13505705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44347.

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 13505705 is about 3675.0108843376. The cubic root of 13505705 is about 238.1436942679.

The spelling of 13505705 in words is "thirteen million, five hundred five thousand, seven hundred five".