13704738821 has 2 divisors, whose sum is σ = 13704738822. Its totient is φ = 13704738820.

The previous prime is 13704738793. The next prime is 13704738823. The reversal of 13704738821 is 12883740731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10881410596 + 2823328225 = 104314^2 + 53135^2 .

It is an emirp because it is prime and its reverse (12883740731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13704738821 is a prime.

Together with 13704738823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13704738823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6852369410 + 6852369411.

It is an arithmetic number, because the mean of its divisors is an integer number (6852369411).

Almost surely, 2^13704738821 is an apocalyptic number.

It is an amenable number.

13704738821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13704738821 is an equidigital number, since it uses as much as digits as its factorization.

13704738821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 13704738821 in words is "thirteen billion, seven hundred four million, seven hundred thirty-eight thousand, eight hundred twenty-one".