13727409 has 4 divisors (see below), whose sum is σ = 18303216. Its totient is φ = 9151604.

The previous prime is 13727401. The next prime is 13727423. The reversal of 13727409 is 90472731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13727409 - 2³ = 13727401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13727409.

It is not an unprimeable number, because it can be changed into a prime (13727401) 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 3 ways as a sum of consecutive naturals, for example, 2287899 + ... + 2287904.

It is an arithmetic number, because the mean of its divisors is an integer number (4575804).

Almost surely, 2^13727409 is an apocalyptic number.

It is an amenable number.

13727409 is a deficient number, since it is larger than the sum of its proper divisors (4575807).

13727409 is an equidigital number, since it uses as much as digits as its factorization.

13727409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575806.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 13727409 is about 3705.0518214999. The cubic root of 13727409 is about 239.4397173373.

The spelling of 13727409 in words is "thirteen million, seven hundred twenty-seven thousand, four hundred nine".