1689933 has 8 divisors (see below), whose sum is σ = 2575168. Its totient is φ = 965664.

The previous prime is 1689931. The next prime is 1689967. The reversal of 1689933 is 3399861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1689933 - 2¹ = 1689931 is a prime.

It is an Ulam number.

It is a Duffinian number.

1689933 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1689891 and 1689900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689931) 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, 40216 + ... + 40257.

It is an arithmetic number, because the mean of its divisors is an integer number (321896).

2^1689933 is an apocalyptic number.

It is an amenable number.

1689933 is a deficient number, since it is larger than the sum of its proper divisors (885235).

1689933 is an equidigital number, since it uses as much as digits as its factorization.

1689933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80483.

The product of its digits is 34992, while the sum is 39.

The square root of 1689933 is about 1299.9742305138. The cubic root of 1689933 is about 119.1122684106.

It can be divided in two parts, 168 and 9933, that added together give a palindrome (10101).

The spelling of 1689933 in words is "one million, six hundred eighty-nine thousand, nine hundred thirty-three".