1689543 has 12 divisors (see below), whose sum is σ = 2452008. Its totient is φ = 1121040.

The previous prime is 1689533. The next prime is 1689551. The reversal of 1689543 is 3459861.

It is not a de Polignac number, because 1689543 - 2⁸ = 1689287 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1689498 and 1689507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2853 + ... + 3393.

It is an arithmetic number, because the mean of its divisors is an integer number (204334).

2^1689543 is an apocalyptic number.

1689543 is a deficient number, since it is larger than the sum of its proper divisors (762465).

1689543 is a wasteful number, since it uses less digits than its factorization.

1689543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 891 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1689543 is about 1299.8242188850. The cubic root of 1689543 is about 119.1031048602.

The spelling of 1689543 in words is "one million, six hundred eighty-nine thousand, five hundred forty-three".