13864399 has 4 divisors (see below), whose sum is σ = 13871880. Its totient is φ = 13856920.

The previous prime is 13864397. The next prime is 13864457. The reversal of 13864399 is 99346831.

13864399 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99346831 = 569 ⋅174599.

It is a cyclic number.

It is not a de Polignac number, because 13864399 - 2¹ = 13864397 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 (13864391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344 + ... + 5434.

It is an arithmetic number, because the mean of its divisors is an integer number (3467970).

Almost surely, 2^13864399 is an apocalyptic number.

13864399 is a deficient number, since it is larger than the sum of its proper divisors (7481).

13864399 is an equidigital number, since it uses as much as digits as its factorization.

13864399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7480.

The product of its digits is 139968, while the sum is 43.

The square root of 13864399 is about 3723.4928494627. The cubic root of 13864399 is about 240.2335631366.

The spelling of 13864399 in words is "thirteen million, eight hundred sixty-four thousand, three hundred ninety-nine".