13803505 has 4 divisors (see below), whose sum is σ = 16564212. Its totient is φ = 11042800.

The previous prime is 13803499. The next prime is 13803547. The reversal of 13803505 is 50530831.

It is a happy number.

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 2985984 + 10817521 = 1728^2 + 3289^2 .

It is not a de Polignac number, because 13803505 - 2¹⁷ = 13672433 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 13803505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380346 + ... + 1380355.

It is an arithmetic number, because the mean of its divisors is an integer number (4141053).

Almost surely, 2^13803505 is an apocalyptic number.

It is an amenable number.

13803505 is a deficient number, since it is larger than the sum of its proper divisors (2760707).

13803505 is an equidigital number, since it uses as much as digits as its factorization.

13803505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760706.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 13803505 is about 3715.3068513920. The cubic root of 13803505 is about 239.8813360142.

The spelling of 13803505 in words is "thirteen million, eight hundred three thousand, five hundred five".