13728899 has 2 divisors, whose sum is σ = 13728900. Its totient is φ = 13728898.

The previous prime is 13728893. The next prime is 13728901. The reversal of 13728899 is 99882731.

13728899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13728899 - 2²⁰ = 12680323 is a prime.

It is a Sophie Germain prime.

Together with 13728901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13728893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864449 + 6864450.

It is an arithmetic number, because the mean of its divisors is an integer number (6864450).

Almost surely, 2^13728899 is an apocalyptic number.

13728899 is a deficient number, since it is larger than the sum of its proper divisors (1).

13728899 is an equidigital number, since it uses as much as digits as its factorization.

13728899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 13728899 is about 3705.2528928536. The cubic root of 13728899 is about 239.4483801100.

The spelling of 13728899 in words is "thirteen million, seven hundred twenty-eight thousand, eight hundred ninety-nine".