13939771 has 4 divisors (see below), whose sum is σ = 14545872. Its totient is φ = 13333672.

The previous prime is 13939769. The next prime is 13939831. The reversal of 13939771 is 17793931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17793931 = 1609 ⋅11059.

It is a cyclic number.

It is not a de Polignac number, because 13939771 - 2¹ = 13939769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13939721) 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 3 ways as a sum of consecutive naturals, for example, 303016 + ... + 303061.

It is an arithmetic number, because the mean of its divisors is an integer number (3636468).

Almost surely, 2^13939771 is an apocalyptic number.

13939771 is a deficient number, since it is larger than the sum of its proper divisors (606101).

13939771 is an equidigital number, since it uses as much as digits as its factorization.

13939771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606100.

The product of its digits is 35721, while the sum is 40.

The square root of 13939771 is about 3733.6002731948. The cubic root of 13939771 is about 240.6681094629.

The spelling of 13939771 in words is "thirteen million, nine hundred thirty-nine thousand, seven hundred seventy-one".