2011689 has 8 divisors (see below), whose sum is σ = 2980320. Its totient is φ = 1341108.

The previous prime is 2011673. The next prime is 2011697. The reversal of 2011689 is 9861102.

It is not a de Polignac number, because 2011689 - 2⁴ = 2011673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 74507 = 2011689 / (2 + 0 + 1 + 1 + 6 + 8 + 9).

It is not an unprimeable number, because it can be changed into a prime (2011699) 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 7 ways as a sum of consecutive naturals, for example, 37227 + ... + 37280.

It is an arithmetic number, because the mean of its divisors is an integer number (372540).

2^2011689 is an apocalyptic number.

It is an amenable number.

2011689 is a deficient number, since it is larger than the sum of its proper divisors (968631).

2011689 is an equidigital number, since it uses as much as digits as its factorization.

2011689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74516 (or 74510 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2011689 is about 1418.3402271670. The cubic root of 2011689 is about 126.2370819707.

The spelling of 2011689 in words is "two million, eleven thousand, six hundred eighty-nine".