2011729 has 6 divisors (see below), whose sum is σ = 2137334. Its totient is φ = 1893120.

The previous prime is 2011703. The next prime is 2011733. The reversal of 2011729 is 9271102.

It can be written as a sum of positive squares in 3 ways, for example, as 1113025 + 898704 = 1055^2 + 948^2 .

It is not a de Polignac number, because 2011729 - 2⁵ = 2011697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3192 + ... + 3769.

2^2011729 is an apocalyptic number.

It is an amenable number.

2011729 is a deficient number, since it is larger than the sum of its proper divisors (125605).

2011729 is an equidigital number, since it uses as much as digits as its factorization.

2011729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2011729 is about 1418.3543280859. The cubic root of 2011729 is about 126.2379186557.

The spelling of 2011729 in words is "two million, eleven thousand, seven hundred twenty-nine".