1689111 has 12 divisors (see below), whose sum is σ = 2481960. Its totient is φ = 1106640.

The previous prime is 1689109. The next prime is 1689113. The reversal of 1689111 is 1119861.

It is an interprime number because it is at equal distance from previous prime (1689109) and next prime (1689113).

It is not a de Polignac number, because 1689111 - 2¹ = 1689109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689113) 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 11 ways as a sum of consecutive naturals, for example, 1060 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (206830).

2^1689111 is an apocalyptic number.

1689111 is a deficient number, since it is larger than the sum of its proper divisors (792849).

1689111 is a wasteful number, since it uses less digits than its factorization.

1689111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246 (or 3243 counting only the distinct ones).

The product of its digits is 432, while the sum is 27.

The square root of 1689111 is about 1299.6580319453. The cubic root of 1689111 is about 119.0929528196.

The spelling of 1689111 in words is "one million, six hundred eighty-nine thousand, one hundred eleven".