13931705539 has 4 divisors (see below), whose sum is σ = 13944112456. Its totient is φ = 13919298624.

The previous prime is 13931705419. The next prime is 13931705551. The reversal of 13931705539 is 93550713931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93550713931 = 3229 ⋅28972039.

It is a cyclic number.

It is not a de Polignac number, because 13931705539 - 2²⁵ = 13898151107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13931706539) 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, 6201774 + ... + 6204019.

It is an arithmetic number, because the mean of its divisors is an integer number (3486028114).

Almost surely, 2^13931705539 is an apocalyptic number.

13931705539 is a deficient number, since it is larger than the sum of its proper divisors (12406917).

13931705539 is a wasteful number, since it uses less digits than its factorization.

13931705539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12406916.

The product of its (nonzero) digits is 382725, while the sum is 46.

The spelling of 13931705539 in words is "thirteen billion, nine hundred thirty-one million, seven hundred five thousand, five hundred thirty-nine".