13938583805 has 4 divisors (see below), whose sum is σ = 16726300572. Its totient is φ = 11150867040.

The previous prime is 13938583783. The next prime is 13938583817. The reversal of 13938583805 is 50838583931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6175916569 + 7762667236 = 78587^2 + 88106^2 .

It is not a de Polignac number, because 13938583805 - 2⁶ = 13938583741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393858376 + ... + 1393858385.

It is an arithmetic number, because the mean of its divisors is an integer number (4181575143).

Almost surely, 2^13938583805 is an apocalyptic number.

It is an amenable number.

13938583805 is a deficient number, since it is larger than the sum of its proper divisors (2787716767).

13938583805 is an equidigital number, since it uses as much as digits as its factorization.

13938583805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787716766.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 13938583805 in words is "thirteen billion, nine hundred thirty-eight million, five hundred eighty-three thousand, eight hundred five".