13939147 has 4 divisors (see below), whose sum is σ = 13947520. Its totient is φ = 13930776.

The previous prime is 13939117. The next prime is 13939153. The reversal of 13939147 is 74193931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74193931 = 7 ⋅10599133.

It is a cyclic number.

It is not a de Polignac number, because 13939147 - 2¹⁹ = 13414859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13939117) 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, 747 + ... + 5332.

It is an arithmetic number, because the mean of its divisors is an integer number (3486880).

Almost surely, 2^13939147 is an apocalyptic number.

13939147 is a deficient number, since it is larger than the sum of its proper divisors (8373).

13939147 is an equidigital number, since it uses as much as digits as its factorization.

13939147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8372.

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

The square root of 13939147 is about 3733.5167068061. The cubic root of 13939147 is about 240.6645183197.

The spelling of 13939147 in words is "thirteen million, nine hundred thirty-nine thousand, one hundred forty-seven".