13503393 has 12 divisors (see below), whose sum is σ = 19873620. Its totient is φ = 8832096.

The previous prime is 13503377. The next prime is 13503401. The reversal of 13503393 is 39330531.

It can be written as a sum of positive squares in 2 ways, for example, as 7800849 + 5702544 = 2793^2 + 2388^2 .

It is not a de Polignac number, because 13503393 - 2⁴ = 13503377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13503313) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 13678 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (1656135).

Almost surely, 2^13503393 is an apocalyptic number.

It is an amenable number.

13503393 is a deficient number, since it is larger than the sum of its proper divisors (6370227).

13503393 is a wasteful number, since it uses less digits than its factorization.

13503393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28368 (or 28365 counting only the distinct ones).

The product of its (nonzero) digits is 3645, while the sum is 27.

The square root of 13503393 is about 3674.6963139830. The cubic root of 13503393 is about 238.1301044641.

The spelling of 13503393 in words is "thirteen million, five hundred three thousand, three hundred ninety-three".