13138971 has 8 divisors (see below), whose sum is σ = 17616144. Its totient is φ = 8710560.

The previous prime is 13138949. The next prime is 13138997. The reversal of 13138971 is 17983131.

13138971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13138971 - 2¹⁰ = 13137947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13138471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11556 + ... + 12641.

It is an arithmetic number, because the mean of its divisors is an integer number (2202018).

Almost surely, 2^13138971 is an apocalyptic number.

13138971 is a deficient number, since it is larger than the sum of its proper divisors (4477173).

13138971 is a wasteful number, since it uses less digits than its factorization.

13138971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24381.

The product of its digits is 4536, while the sum is 33.

The square root of 13138971 is about 3624.7718548896. The cubic root of 13138971 is about 235.9683657206.

The spelling of 13138971 in words is "thirteen million, one hundred thirty-eight thousand, nine hundred seventy-one".