1689108 has 12 divisors (see below), whose sum is σ = 3941280. Its totient is φ = 563032.

The previous prime is 1689071. The next prime is 1689109. The reversal of 1689108 is 8019861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70368 + ... + 70391.

It is an arithmetic number, because the mean of its divisors is an integer number (328440).

2^1689108 is an apocalyptic number.

It is an amenable number.

1689108 is an abundant number, since it is smaller than the sum of its proper divisors (2252172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1689108 is a wasteful number, since it uses less digits than its factorization.

1689108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140766 (or 140764 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1689108 is about 1299.6568777951. The cubic root of 1689108 is about 119.0928823133.

The spelling of 1689108 in words is "one million, six hundred eighty-nine thousand, one hundred eight".