13208939 has 4 divisors (see below), whose sum is σ = 13216224. Its totient is φ = 13201656.

The previous prime is 13208917. The next prime is 13208957. The reversal of 13208939 is 93980231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93980231 = 23 ⋅4086097.

It is a cyclic number.

It is not a de Polignac number, because 13208939 - 2¹² = 13204843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13208899 and 13208908.

It is not an unprimeable number, because it can be changed into a prime (13208339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (3304056).

Almost surely, 2^13208939 is an apocalyptic number.

13208939 is a deficient number, since it is larger than the sum of its proper divisors (7285).

13208939 is an equidigital number, since it uses as much as digits as its factorization.

13208939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 13208939 is about 3634.4104061044. The cubic root of 13208939 is about 236.3864860867.

The spelling of 13208939 in words is "thirteen million, two hundred eight thousand, nine hundred thirty-nine".