13720722329 has 2 divisors, whose sum is σ = 13720722330. Its totient is φ = 13720722328.

The previous prime is 13720722313. The next prime is 13720722331. The reversal of 13720722329 is 92322702731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11933377600 + 1787344729 = 109240^2 + 42277^2 .

It is a cyclic number.

It is not a de Polignac number, because 13720722329 - 2⁴ = 13720722313 is a prime.

Together with 13720722331, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13720722292 and 13720722301.

It is not a weakly prime, because it can be changed into another prime (13720722229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860361164 + 6860361165.

It is an arithmetic number, because the mean of its divisors is an integer number (6860361165).

Almost surely, 2^13720722329 is an apocalyptic number.

It is an amenable number.

13720722329 is a deficient number, since it is larger than the sum of its proper divisors (1).

13720722329 is an equidigital number, since it uses as much as digits as its factorization.

13720722329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The spelling of 13720722329 in words is "thirteen billion, seven hundred twenty million, seven hundred twenty-two thousand, three hundred twenty-nine".