13871628493 has 4 divisors (see below), whose sum is σ = 14349960540. Its totient is φ = 13393296448.

The previous prime is 13871628481. The next prime is 13871628517. The reversal of 13871628493 is 39482617831.

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 9573252649 + 4298375844 = 97843^2 + 65562^2 .

It is a cyclic number.

It is not a de Polignac number, because 13871628493 - 2²¹ = 13869531341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13871628493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13871628403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239165980 + ... + 239166037.

It is an arithmetic number, because the mean of its divisors is an integer number (3587490135).

Almost surely, 2^13871628493 is an apocalyptic number.

It is an amenable number.

13871628493 is a deficient number, since it is larger than the sum of its proper divisors (478332047).

13871628493 is an equidigital number, since it uses as much as digits as its factorization.

13871628493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478332046.

The product of its digits is 1741824, while the sum is 52.

The spelling of 13871628493 in words is "thirteen billion, eight hundred seventy-one million, six hundred twenty-eight thousand, four hundred ninety-three".