2771729 has 2 divisors, whose sum is σ = 2771730. Its totient is φ = 2771728.

The previous prime is 2771719. The next prime is 2771759. The reversal of 2771729 is 9271772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2755600 + 16129 = 1660^2 + 127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2771729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2771719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385864 + 1385865.

It is an arithmetic number, because the mean of its divisors is an integer number (1385865).

2^2771729 is an apocalyptic number.

It is an amenable number.

2771729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2771729 is an equidigital number, since it uses as much as digits as its factorization.

2771729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12348, while the sum is 35.

The square root of 2771729 is about 1664.8510443881. The cubic root of 2771729 is about 140.4700019964.

The spelling of 2771729 in words is "two million, seven hundred seventy-one thousand, seven hundred twenty-nine".