13728619 has 4 divisors (see below), whose sum is σ = 13757760. Its totient is φ = 13699480.

The previous prime is 13728607. The next prime is 13728647. The reversal of 13728619 is 91682731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91682731 = 7 ⋅13097533.

It is a cyclic number.

It is not a de Polignac number, because 13728619 - 2¹¹ = 13726571 is a prime.

It is a super-2 number, since 2×13728619² = 376949959294322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13728679) 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, 13852 + ... + 14809.

It is an arithmetic number, because the mean of its divisors is an integer number (3439440).

Almost surely, 2^13728619 is an apocalyptic number.

13728619 is a deficient number, since it is larger than the sum of its proper divisors (29141).

13728619 is an equidigital number, since it uses as much as digits as its factorization.

13728619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29140.

The product of its digits is 18144, while the sum is 37.

The square root of 13728619 is about 3705.2151084654. The cubic root of 13728619 is about 239.4467522542.

The spelling of 13728619 in words is "thirteen million, seven hundred twenty-eight thousand, six hundred nineteen".