13946139 has 12 divisors (see below), whose sum is σ = 20421336. Its totient is φ = 9169632.

The previous prime is 13946123. The next prime is 13946143. The reversal of 13946139 is 93164931.

13946139 is a `hidden beast` number, since 1 + 39 + 4 + 613 + 9 = 666.

It is not a de Polignac number, because 13946139 - 2⁴ = 13946123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13946159) 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 11 ways as a sum of consecutive naturals, for example, 9957 + ... + 11270.

It is an arithmetic number, because the mean of its divisors is an integer number (1701778).

Almost surely, 2^13946139 is an apocalyptic number.

13946139 is a deficient number, since it is larger than the sum of its proper divisors (6475197).

13946139 is a wasteful number, since it uses less digits than its factorization.

13946139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21306 (or 21303 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 13946139 is about 3734.4529719893. The cubic root of 13946139 is about 240.7047514137.

The spelling of 13946139 in words is "thirteen million, nine hundred forty-six thousand, one hundred thirty-nine".