1689046 has 4 divisors (see below), whose sum is σ = 2533572. Its totient is φ = 844522.

The previous prime is 1689031. The next prime is 1689049. The reversal of 1689046 is 6409861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6409861 = 743 ⋅8627.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422260 + ... + 422263.

It is an arithmetic number, because the mean of its divisors is an integer number (633393).

2^1689046 is an apocalyptic number.

1689046 is a deficient number, since it is larger than the sum of its proper divisors (844526).

1689046 is an equidigital number, since it uses as much as digits as its factorization.

1689046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844525.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1689046 is about 1299.6330251267. The cubic root of 1689046 is about 119.0914251637.

The spelling of 1689046 in words is "one million, six hundred eighty-nine thousand, forty-six".