11439389 has 4 divisors (see below), whose sum is σ = 12319356. Its totient is φ = 10559424.

The previous prime is 11439383. The next prime is 11439409. The reversal of 11439389 is 98393411.

It is a happy number.

11439389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6300100 + 5139289 = 2510^2 + 2267^2 .

It is a cyclic number.

It is not a de Polignac number, because 11439389 - 2¹² = 11435293 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 (11439383) 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, 439964 + ... + 439989.

It is an arithmetic number, because the mean of its divisors is an integer number (3079839).

Almost surely, 2^11439389 is an apocalyptic number.

It is an amenable number.

11439389 is a deficient number, since it is larger than the sum of its proper divisors (879967).

11439389 is an equidigital number, since it uses as much as digits as its factorization.

11439389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879966.

The product of its digits is 23328, while the sum is 38.

The square root of 11439389 is about 3382.2165808830. The cubic root of 11439389 is about 225.3206227342.

The spelling of 11439389 in words is "eleven million, four hundred thirty-nine thousand, three hundred eighty-nine".