13389305 has 4 divisors (see below), whose sum is σ = 16067172. Its totient is φ = 10711440.

The previous prime is 13389293. The next prime is 13389307. The reversal of 13389305 is 50398331.

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 4932841 + 8456464 = 2221^2 + 2908^2 .

It is not a de Polignac number, because 13389305 - 2⁸ = 13389049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13389307) 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, 1338926 + ... + 1338935.

It is an arithmetic number, because the mean of its divisors is an integer number (4016793).

Almost surely, 2^13389305 is an apocalyptic number.

It is an amenable number.

13389305 is a deficient number, since it is larger than the sum of its proper divisors (2677867).

13389305 is an equidigital number, since it uses as much as digits as its factorization.

13389305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677866.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 13389305 is about 3659.1399262668. The cubic root of 13389305 is about 237.4575658259.

The spelling of 13389305 in words is "thirteen million, three hundred eighty-nine thousand, three hundred five".