13238189 has 4 divisors (see below), whose sum is σ = 14016924. Its totient is φ = 12459456.

The previous prime is 13238177. The next prime is 13238207. The reversal of 13238189 is 98183231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98183231 = 31 ⋅3167201.

It can be written as a sum of positive squares in 2 ways, for example, as 9815689 + 3422500 = 3133^2 + 1850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13238189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13238129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389342 + ... + 389375.

It is an arithmetic number, because the mean of its divisors is an integer number (3504231).

Almost surely, 2^13238189 is an apocalyptic number.

It is an amenable number.

13238189 is a deficient number, since it is larger than the sum of its proper divisors (778735).

13238189 is an equidigital number, since it uses as much as digits as its factorization.

13238189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778734.

The product of its digits is 10368, while the sum is 35.

The square root of 13238189 is about 3638.4322173156. The cubic root of 13238189 is about 236.5608429442.

The spelling of 13238189 in words is "thirteen million, two hundred thirty-eight thousand, one hundred eighty-nine".