275729 has 2 divisors, whose sum is σ = 275730. Its totient is φ = 275728.

The previous prime is 275719. The next prime is 275741. The reversal of 275729 is 927572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270400 + 5329 = 520^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 275729 - 2¹⁶ = 210193 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 275695 and 275704.

It is not a weakly prime, because it can be changed into another prime (275719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137864 + 137865.

It is an arithmetic number, because the mean of its divisors is an integer number (137865).

2²⁷⁵⁷²⁹ is an apocalyptic number.

It is an amenable number.

275729 is a deficient number, since it is larger than the sum of its proper divisors (1).

275729 is an equidigital number, since it uses as much as digits as its factorization.

275729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 32.

The square root of 275729 is about 525.0990382775. The cubic root of 275729 is about 65.0869841361.

The spelling of 275729 in words is "two hundred seventy-five thousand, seven hundred twenty-nine".