727729 has 2 divisors, whose sum is σ = 727730. Its totient is φ = 727728.

The previous prime is 727717. The next prime is 727733. The reversal of 727729 is 927727.

It is a happy number.

727729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 63504 = 815^2 + 252^2 .

It is an emirp because it is prime and its reverse (927727) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-727729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 727694 and 727703.

It is not a weakly prime, because it can be changed into another prime (727759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363864 + 363865.

It is an arithmetic number, because the mean of its divisors is an integer number (363865).

2⁷²⁷⁷²⁹ is an apocalyptic number.

It is an amenable number.

727729 is a deficient number, since it is larger than the sum of its proper divisors (1).

727729 is an equidigital number, since it uses as much as digits as its factorization.

727729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12348, while the sum is 34.

The square root of 727729 is about 853.0703370766. The cubic root of 727729 is about 89.9476650464.

The spelling of 727729 in words is "seven hundred twenty-seven thousand, seven hundred twenty-nine".