1689982 has 8 divisors (see below), whose sum is σ = 2897136. Its totient is φ = 724272.

The previous prime is 1689967. The next prime is 1690009. The reversal of 1689982 is 2899861.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 60343 + ... + 60370.

It is an arithmetic number, because the mean of its divisors is an integer number (362142).

2^1689982 is an apocalyptic number.

1689982 is a deficient number, since it is larger than the sum of its proper divisors (1207154).

1689982 is a wasteful number, since it uses less digits than its factorization.

1689982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120722.

The product of its digits is 62208, while the sum is 43.

The square root of 1689982 is about 1299.9930769046. The cubic root of 1689982 is about 119.1134196288.

It can be divided in two parts, 16 and 89982, that added together give a palindrome (89998).

The spelling of 1689982 in words is "one million, six hundred eighty-nine thousand, nine hundred eighty-two".