13911399 has 8 divisors (see below), whose sum is σ = 20609520. Its totient is φ = 9274248.

The previous prime is 13911397. The next prime is 13911407. The reversal of 13911399 is 99311931.

13911399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13911399 - 2¹ = 13911397 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13911397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257592 + ... + 257645.

It is an arithmetic number, because the mean of its divisors is an integer number (2576190).

Almost surely, 2^13911399 is an apocalyptic number.

13911399 is a deficient number, since it is larger than the sum of its proper divisors (6698121).

13911399 is an equidigital number, since it uses as much as digits as its factorization.

13911399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515246 (or 515240 counting only the distinct ones).

The product of its digits is 6561, while the sum is 36.

The square root of 13911399 is about 3729.7987881386. The cubic root of 13911399 is about 240.5047190836.

The spelling of 13911399 in words is "thirteen million, nine hundred eleven thousand, three hundred ninety-nine".