13847734621 has 6 divisors (see below), whose sum is σ = 16108589310. Its totient is φ = 11869486776.

The previous prime is 13847734619. The next prime is 13847734651. The reversal of 13847734621 is 12643774831.

It can be written as a sum of positive squares in only one way, i.e., 9883143396 + 3964591225 = 99414^2 + 62965^2 .

It is not a de Polignac number, because 13847734621 - 2¹ = 13847734619 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 (13847734651) 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 5 ways as a sum of consecutive naturals, for example, 141303366 + ... + 141303463.

It is an arithmetic number, because the mean of its divisors is an integer number (2684764885).

Almost surely, 2^13847734621 is an apocalyptic number.

13847734621 is the 67941-st hex number.

It is an amenable number.

13847734621 is a deficient number, since it is larger than the sum of its proper divisors (2260854689).

13847734621 is an equidigital number, since it uses as much as digits as its factorization.

13847734621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282606843 (or 282606836 counting only the distinct ones).

The product of its digits is 677376, while the sum is 46.

The spelling of 13847734621 in words is "thirteen billion, eight hundred forty-seven million, seven hundred thirty-four thousand, six hundred twenty-one".