13867971 has 24 divisors (see below), whose sum is σ = 21213360. Its totient is φ = 8027136.

The previous prime is 13867969. The next prime is 13867999. The reversal of 13867971 is 17976831.

It is not a de Polignac number, because 13867971 - 2¹ = 13867969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13867901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7815 + ... + 9423.

It is an arithmetic number, because the mean of its divisors is an integer number (883890).

Almost surely, 2^13867971 is an apocalyptic number.

13867971 is a deficient number, since it is larger than the sum of its proper divisors (7345389).

13867971 is a wasteful number, since it uses less digits than its factorization.

13867971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1642 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 13867971 is about 3723.9724757307. The cubic root of 13867971 is about 240.2541924863.

The spelling of 13867971 in words is "thirteen million, eight hundred sixty-seven thousand, nine hundred seventy-one".