13144399 has 4 divisors (see below), whose sum is σ = 13231600. Its totient is φ = 13057200.

The previous prime is 13144393. The next prime is 13144423. The reversal of 13144399 is 99344131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99344131 = 6563 ⋅15137.

It is a cyclic number.

It is not a de Polignac number, because 13144399 - 2¹¹ = 13142351 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13144393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43374 + ... + 43675.

It is an arithmetic number, because the mean of its divisors is an integer number (3307900).

Almost surely, 2^13144399 is an apocalyptic number.

13144399 is a deficient number, since it is larger than the sum of its proper divisors (87201).

13144399 is an equidigital number, since it uses as much as digits as its factorization.

13144399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87200.

The product of its digits is 11664, while the sum is 34.

The square root of 13144399 is about 3625.5205143538. The cubic root of 13144399 is about 236.0008558333. Note that the first 3 decimals are identical.

The spelling of 13144399 in words is "thirteen million, one hundred forty-four thousand, three hundred ninety-nine".