1689143 has 6 divisors (see below), whose sum is σ = 1769112. Its totient is φ = 1609740.

The previous prime is 1689113. The next prime is 1689167. The reversal of 1689143 is 3419861.

It is a happy number.

It is not a de Polignac number, because 1689143 - 2⁸ = 1688887 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6098 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (294852).

2^1689143 is an apocalyptic number.

1689143 is a deficient number, since it is larger than the sum of its proper divisors (79969).

1689143 is an frugal number, since it uses more digits than its factorization.

1689143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 294 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 1689143 is about 1299.6703428177. The cubic root of 1689143 is about 119.0937048820.

The spelling of 1689143 in words is "one million, six hundred eighty-nine thousand, one hundred forty-three".