13891671 has 12 divisors (see below), whose sum is σ = 20445048. Its totient is φ = 9086064.

The previous prime is 13891651. The next prime is 13891697. The reversal of 13891671 is 17619831.

It is not a de Polignac number, because 13891671 - 2²³ = 5503063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14085 + ... + 15038.

It is an arithmetic number, because the mean of its divisors is an integer number (1703754).

Almost surely, 2^13891671 is an apocalyptic number.

13891671 is a deficient number, since it is larger than the sum of its proper divisors (6553377).

13891671 is a wasteful number, since it uses less digits than its factorization.

13891671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29182 (or 29179 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 13891671 is about 3727.1532031834. The cubic root of 13891671 is about 240.3909773072.

It can be divided in two parts, 138 and 91671, that added together give a square (91809 = 303²).

The spelling of 13891671 in words is "thirteen million, eight hundred ninety-one thousand, six hundred seventy-one".