13721799193 has 2 divisors, whose sum is σ = 13721799194. Its totient is φ = 13721799192.

The previous prime is 13721799023. The next prime is 13721799211. The reversal of 13721799193 is 39199712731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10675642329 + 3046156864 = 103323^2 + 55192^2 .

It is an emirp because it is prime and its reverse (39199712731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13721799193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13721799193.

It is not a weakly prime, because it can be changed into another prime (13721709193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860899596 + 6860899597.

It is an arithmetic number, because the mean of its divisors is an integer number (6860899597).

Almost surely, 2^13721799193 is an apocalyptic number.

It is an amenable number.

13721799193 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721799193 is an equidigital number, since it uses as much as digits as its factorization.

13721799193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 52.

The spelling of 13721799193 in words is "thirteen billion, seven hundred twenty-one million, seven hundred ninety-nine thousand, one hundred ninety-three".