13538747 has 4 divisors (see below), whose sum is σ = 13672896. Its totient is φ = 13404600.

The previous prime is 13538731. The next prime is 13538779. The reversal of 13538747 is 74783531.

13538747 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13538747 - 2⁴ = 13538731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13538747.

It is not an unprimeable number, because it can be changed into a prime (13531747) 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, 66923 + ... + 67124.

It is an arithmetic number, because the mean of its divisors is an integer number (3418224).

Almost surely, 2^13538747 is an apocalyptic number.

13538747 is a deficient number, since it is larger than the sum of its proper divisors (134149).

13538747 is a wasteful number, since it uses less digits than its factorization.

13538747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134148.

The product of its digits is 70560, while the sum is 38.

The square root of 13538747 is about 3679.5036350030. The cubic root of 13538747 is about 238.3377440080.

The spelling of 13538747 in words is "thirteen million, five hundred thirty-eight thousand, seven hundred forty-seven".