13891964 has 12 divisors (see below), whose sum is σ = 25590600. Its totient is φ = 6580368.

The previous prime is 13891961. The next prime is 13891979. The reversal of 13891964 is 46919831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891961) 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, 91319 + ... + 91470.

It is an arithmetic number, because the mean of its divisors is an integer number (2132550).

Almost surely, 2^13891964 is an apocalyptic number.

It is an amenable number.

13891964 is a deficient number, since it is larger than the sum of its proper divisors (11698636).

13891964 is a wasteful number, since it uses less digits than its factorization.

13891964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182812 (or 182810 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 13891964 is about 3727.1925091146. The cubic root of 13891964 is about 240.3926673862.

The spelling of 13891964 in words is "thirteen million, eight hundred ninety-one thousand, nine hundred sixty-four".