13447389 has 8 divisors (see below), whose sum is σ = 18224032. Its totient is φ = 8817840.

The previous prime is 13447373. The next prime is 13447393. The reversal of 13447389 is 98374431.

13447389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13447389 - 2⁴ = 13447373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13447309) 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 7 ways as a sum of consecutive naturals, for example, 36559 + ... + 36924.

It is an arithmetic number, because the mean of its divisors is an integer number (2278004).

Almost surely, 2^13447389 is an apocalyptic number.

It is an amenable number.

13447389 is a deficient number, since it is larger than the sum of its proper divisors (4776643).

13447389 is an equidigital number, since it uses as much as digits as its factorization.

13447389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73547.

The product of its digits is 72576, while the sum is 39.

The square root of 13447389 is about 3667.0681749867. The cubic root of 13447389 is about 237.8004411989.

The spelling of 13447389 in words is "thirteen million, four hundred forty-seven thousand, three hundred eighty-nine".