1689034 has 4 divisors (see below), whose sum is σ = 2533554. Its totient is φ = 844516.

The previous prime is 1689031. The next prime is 1689049. The reversal of 1689034 is 4309861.

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., 1570009 + 119025 = 1253^2 + 345^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1688987 and 1689005.

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 as a sum of consecutive naturals, namely, 422257 + ... + 422260.

2^1689034 is an apocalyptic number.

1689034 is a deficient number, since it is larger than the sum of its proper divisors (844520).

1689034 is an equidigital number, since it uses as much as digits as its factorization.

1689034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844519.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1689034 is about 1299.6284084307. The cubic root of 1689034 is about 119.0911431306.

The spelling of 1689034 in words is "one million, six hundred eighty-nine thousand, thirty-four".