13869399 has 16 divisors (see below), whose sum is σ = 19668960. Its totient is φ = 8693120.

The previous prime is 13869397. The next prime is 13869403. The reversal of 13869399 is 99396831.

It is a happy number.

It is not a de Polignac number, because 13869399 - 2¹ = 13869397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13869397) 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 15 ways as a sum of consecutive naturals, for example, 14269 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (1229310).

Almost surely, 2^13869399 is an apocalyptic number.

13869399 is a deficient number, since it is larger than the sum of its proper divisors (5799561).

13869399 is an frugal number, since it uses more digits than its factorization.

13869399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 961 counting only the distinct ones).

The product of its digits is 314928, while the sum is 48.

The square root of 13869399 is about 3724.1642015357. The cubic root of 13869399 is about 240.2624386147.

The spelling of 13869399 in words is "thirteen million, eight hundred sixty-nine thousand, three hundred ninety-nine".