13889471 has 4 divisors (see below), whose sum is σ = 13990992. Its totient is φ = 13787952.

The previous prime is 13889461. The next prime is 13889483. The reversal of 13889471 is 17498831.

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 13889471 - 2¹⁰ = 13888447 is a prime.

It is a super-3 number, since 3×13889471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13889411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50555 + ... + 50828.

It is an arithmetic number, because the mean of its divisors is an integer number (3497748).

Almost surely, 2^13889471 is an apocalyptic number.

13889471 is a deficient number, since it is larger than the sum of its proper divisors (101521).

13889471 is a wasteful number, since it uses less digits than its factorization.

13889471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101520.

The product of its digits is 48384, while the sum is 41.

The square root of 13889471 is about 3726.8580600822. The cubic root of 13889471 is about 240.3782865357.

The spelling of 13889471 in words is "thirteen million, eight hundred eighty-nine thousand, four hundred seventy-one".