13827897943 has 4 divisors (see below), whose sum is σ = 14304722040. Its totient is φ = 13351073848.

The previous prime is 13827897899. The next prime is 13827897947. The reversal of 13827897943 is 34979872831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13827897943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13827897947) 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, 238412005 + ... + 238412062.

It is an arithmetic number, because the mean of its divisors is an integer number (3576180510).

Almost surely, 2^13827897943 is an apocalyptic number.

13827897943 is a deficient number, since it is larger than the sum of its proper divisors (476824097).

13827897943 is an equidigital number, since it uses as much as digits as its factorization.

13827897943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476824096.

The product of its digits is 18289152, while the sum is 61.

The spelling of 13827897943 in words is "thirteen billion, eight hundred twenty-seven million, eight hundred ninety-seven thousand, nine hundred forty-three".