13728427 has 2 divisors, whose sum is σ = 13728428. Its totient is φ = 13728426.

The previous prime is 13728419. The next prime is 13728433. The reversal of 13728427 is 72482731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13728427 - 2³ = 13728419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13728392 and 13728401.

It is not a weakly prime, because it can be changed into another prime (13728437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864213 + 6864214.

It is an arithmetic number, because the mean of its divisors is an integer number (6864214).

Almost surely, 2^13728427 is an apocalyptic number.

13728427 is a deficient number, since it is larger than the sum of its proper divisors (1).

13728427 is an equidigital number, since it uses as much as digits as its factorization.

13728427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 13728427 is about 3705.1891989479. The cubic root of 13728427 is about 239.4456359975.

The spelling of 13728427 in words is "thirteen million, seven hundred twenty-eight thousand, four hundred twenty-seven".