1689466 has 4 divisors (see below), whose sum is σ = 2534202. Its totient is φ = 844732.

The previous prime is 1689451. The next prime is 1689497. The reversal of 1689466 is 6649861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 731025 = 979^2 + 855^2 .

It is a d-powerful number, because it can be written as 1 + 6⁴ + 8³ + 9 + 4⁴ + 6⁵ + 6⁸ .

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 as a sum of consecutive naturals, namely, 422365 + ... + 422368.

2^1689466 is an apocalyptic number.

1689466 is a deficient number, since it is larger than the sum of its proper divisors (844736).

1689466 is an equidigital number, since it uses as much as digits as its factorization.

1689466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844735.

The product of its digits is 62208, while the sum is 40.

The square root of 1689466 is about 1299.7945991579. The cubic root of 1689466 is about 119.1012954797.

The spelling of 1689466 in words is "one million, six hundred eighty-nine thousand, four hundred sixty-six".