13720727549 has 2 divisors, whose sum is σ = 13720727550. Its totient is φ = 13720727548.

The previous prime is 13720727543. The next prime is 13720727567. The reversal of 13720727549 is 94572702731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9970022500 + 3750705049 = 99850^2 + 61243^2 .

It is a cyclic number.

It is not a de Polignac number, because 13720727549 - 2²⁴ = 13703950333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13720727543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860363774 + 6860363775.

It is an arithmetic number, because the mean of its divisors is an integer number (6860363775).

Almost surely, 2^13720727549 is an apocalyptic number.

It is an amenable number.

13720727549 is a deficient number, since it is larger than the sum of its proper divisors (1).

13720727549 is an equidigital number, since it uses as much as digits as its factorization.

13720727549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 13720727549 in words is "thirteen billion, seven hundred twenty million, seven hundred twenty-seven thousand, five hundred forty-nine".