13939471 has 24 divisors (see below), whose sum is σ = 17747520. Its totient is φ = 10850112.

The previous prime is 13939469. The next prime is 13939481. The reversal of 13939471 is 17493931.

It is not a de Polignac number, because 13939471 - 2¹ = 13939469 is a prime.

It is a super-3 number, since 3×13939471³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13939471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13939411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50185 + ... + 50461.

It is an arithmetic number, because the mean of its divisors is an integer number (739480).

Almost surely, 2^13939471 is an apocalyptic number.

13939471 is a deficient number, since it is larger than the sum of its proper divisors (3808049).

13939471 is a wasteful number, since it uses less digits than its factorization.

13939471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 376 counting only the distinct ones).

The product of its digits is 20412, while the sum is 37.

The square root of 13939471 is about 3733.5600972798. The cubic root of 13939471 is about 240.6663829651. Note that the first 3 decimals are identical.

The spelling of 13939471 in words is "thirteen million, nine hundred thirty-nine thousand, four hundred seventy-one".