13727729 has 2 divisors, whose sum is σ = 13727730. Its totient is φ = 13727728.

The previous prime is 13727719. The next prime is 13727767. The reversal of 13727729 is 92772731.

It is an a-pointer prime, because the next prime (13727767) can be obtained adding 13727729 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13337104 + 390625 = 3652^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 13727729 - 2⁸ = 13727473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13727692 and 13727701.

It is not a weakly prime, because it can be changed into another prime (13727719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6863864 + 6863865.

It is an arithmetic number, because the mean of its divisors is an integer number (6863865).

Almost surely, 2^13727729 is an apocalyptic number.

It is an amenable number.

13727729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13727729 is an equidigital number, since it uses as much as digits as its factorization.

13727729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37044, while the sum is 38.

The square root of 13727729 is about 3705.0950055295. The cubic root of 13727729 is about 239.4415778514.

The spelling of 13727729 in words is "thirteen million, seven hundred twenty-seven thousand, seven hundred twenty-nine".