1689001 has 8 divisors (see below), whose sum is σ = 1814184. Its totient is φ = 1566720.

The previous prime is 1688987. The next prime is 1689031. The reversal of 1689001 is 1009861.

It can be written as a sum of positive squares in 4 ways, for example, as 249001 + 1440000 = 499^2 + 1200^2 .

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

It is not a de Polignac number, because 1689001 - 2⁵ = 1688969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689031) 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, 561 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (226773).

2^1689001 is an apocalyptic number.

It is an amenable number.

1689001 is a deficient number, since it is larger than the sum of its proper divisors (125183).

1689001 is a wasteful number, since it uses less digits than its factorization.

1689001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1689001 is about 1299.6157124319. The cubic root of 1689001 is about 119.0903675328.

The spelling of 1689001 in words is "one million, six hundred eighty-nine thousand, one".